Question

how is factoring used to solve quadratic equations. Need to demonstrate the process with an example to show.

Answer 1

hi nikki

Answer 2

factoring is used every day

Answer 3

Hi

Answer 4

wazzup?

Answer 5

you asked the same question twice

Answer 6

Just having trouble with this class

Answer 7

ok

Answer 8

I know...for some reason, it happened

Answer 9

well if you throw a baseball with initial velocity v0, and initial height y0, you will need to factor to find when it hits the ground

Answer 10

huh?

Answer 11

the height of the ball is y = -1/2 gt^2 + vo*t + y0 , where g is your acceleration due to gravity (makes the ball come back to ground)

Answer 12

you wanna know about factoring right?

Answer 13

you asked where do we factor? when we solve trajectory problems you dummy

Answer 14

ask me huh again, i dare you

Answer 15

wow...that is mean

Answer 16

im not getting paid after all

Answer 17

amistre, super hero? wow

Answer 18

how is factoring used to solve quadratic equations. Need to demonstrate the process with an example to show. Is what I asked...I just do not understand what they want from me...

Answer 19

solving for any "roots" or "zeros" of an equation, what we are doing is finding all the places that the graph hits the x axis because y = 0 there.

Answer 20

amistre, its useless

Answer 21

he will just say "huh"

Answer 22

with quadratics, the line of the graph bends in such a manner that it can cross the x axis twis, so there may be at most 2 zeros to solve.

Answer 23

hmmm, i might have misread the question after all, my bad

Answer 24

amistre, can you solve the surface area of a torus, using integral 2pi y dS?

Answer 25

amistre, check the discriminant b^2 - 4ac, there are three cases

Answer 26

for example, can you see the place that this quadratic curve touches the x axis in two spots?

Answer 27

amistre, youre like god here. is youre mathematical knowledge proportionate to your score?

Answer 28

I appreciate all the help...I did not understand what they wanted...I'm sorry if it made anyone mad...

Answer 29

im just an idiot in disguise ;)

Answer 30

nikki, no one is mad :)

Answer 31

sometimes im mean, but im not mad :)

Answer 32

I am not a guy either...lol

Answer 33

oh sorry

Answer 34

wait, so youre a goddess :)

Answer 35

Its ok...sometimes I just do not get this stuff...I want to...it just does not happen...Not a math person...

Answer 36

amistre, surface area integrals. driving me nuts!!!

Answer 37

A mother of 2

Answer 38

i have it here on twiddla http://www.twiddla.com/521818

Answer 39

when we factor the quadratic equation we get if "two" component parts that multiplied to get it:

for example:

x^2 +6x +8 is a quadratic expression right?

Answer 40

i think the student is lost in the math jargon. it happens

Answer 41

I think so

Answer 42

surface area integrals tend to be of the "ln(sec+tan)" variety right?

Answer 43

I HATE MATH!!!!!!!! Just sayin!

Answer 44

hmmm, not really , could be, check this link http://www.twiddla.com/521818 i posted the problem

Answer 45

nikki, you dont hate math. you just want things to be logical. i understand

Answer 46

Nikki: when we "factor" the quadratic we get this:

(x+2)(x+4) = 0 we make it equal to zero because we want to know what x is when y = 0

Answer 47

cantor; ill check it out in abit ;)

Answer 48

thanks

Answer 49

nikki, whats a quadratic equation> what it means to "solve quadratic equation"

Answer 50

Oh yes...logical would be great:) I am one that needs to get it right now, I am a perfectionist and this is not helping anything, throws me off...very frustrating!

Answer 51

ok , slow down. ok lets get the jargon straight

Answer 52

a quadratic equation is generally y = ax^2 + bx + c

Answer 53

ill show how factoring helps later to solve, but what does it mean to solve a quadratic equation. this is more jargon or math lingo

Answer 54

Nikki: we know that any number when multiplied by "0" = 0 right?

for example:

3(0) = 0

34(0) = 0

r2d2(0)= 0

you with me?

Answer 55

sure...

Answer 56

amistre, want to chime in. what it means to "solve quadratic equation"

Answer 57

cantor, to find their roots :)

Answer 58

ok

Answer 59

the roots are the x solutions such that ax^2 + bx + c = 0

Answer 60

Nikki;

then when we have the factored form of a quadratic, we know that one or the other has to equal zero in order for function to equal zero.

tell me:

(x+4)(0) = 0 ?

does

(0)(x+2) = 0?

Answer 61

ok, i got lost there for a second. ok a quadratic equation in x is ax^2 + bx + c = some number, correct? a quadratic function i think would be y = ax^2 + bx + c , because now you have y is a function of x

Answer 62

ok...I think I got it....hopefully:) Thanks for all your help!

Answer 63

amistre, ill politely bow out of here, but please check my twiddla

Answer 64

ill be there shortly, and maybe I can even be helpful ;)

Answer 65

oh i didnt state the question, one sec

Answer 66

surface area of a torus. it is

generated by circle with radius r , off center. Suppose

the circle is centered at (x - R)^2 + y^2 = r^2, and R> r. so the distance from (0,0) to the center of the

circle is (R,0) which has radius r.
Ok the integral i got is
int 2pi y sqrt [ 1+ (dy/dx)^2] = int 2pi sqrt ( r^2 - (

x-R)^2) [ 1 + (-2(x-R)/(2sqrt( r^2 - ( x-R)^2) ^2 ]

Answer 67

Is this to me?

Answer 68

Nikki;
the factored form allows us to "see" into the quadratic, and know quite easily what the solutions are.

(x+4)(x+2) = 0

x = -4 or x = -2 because both these solutions makes one or the other a (0) right?

Answer 69

yeah

Answer 70

ack!!...a torus surface..... lol

Answer 71

Nikki: then that is all ther eis to it, I just hope you can make sense of it between the posting lol

Answer 72

I am so confused...not sure if it was all for me or for you guys?lol

Answer 73

well i have two ways to solve it, one way works, the other doesnt,
int 2pi y ( 1 + dy/dx^2) dx , that doesnt work,
but int 2pi x ( 1 + dx/dy^2) dy that works. not sure why

Answer 74

nikki, ok i will start over , want to do this? ARE YOU READY!!!

Answer 75

YES! Sorry...

Answer 76

oh no im gonna miss jay leno

Answer 77

ok , uno momento

Answer 78

I am glad I have DVR

Answer 79

what do you watch?

Answer 80

a lot of shows, I really like greys and things like that...so I record them so I do not have to watch all the commercials

Answer 81

I see the equations..... wheres the torus?

Answer 82

ok whats a quadratic equation


In mathematics, a quadratic equation is a polynomial equation of the second degree. The general form is
ax^2 + bx + c = 0

Answer 83

cantorset, i wrote log3(n)<n as n<3^n for the log proof sorry for interrupting later

Answer 84

Are you still there?

Answer 85

hey
sorry

Answer 86

Its ok....I have to figure out an example for this, and I guess I am not getting this as much as I wanted to be or thought...

Answer 87

give me 5 minutes

Answer 88

ok....I appreciate your help...I really do.

Answer 89

I will go check on my daughters

Answer 90

ok I'm back.....

Answer 91

welcome back :)

Answer 92

Thanks! I am trying to figure out how some get this math stuff, and then there is me...who has no idea and thinks I get it and then does not...