Question

use the quadratic formula to solve the equation to the exact value or round to two decimal places. 3x^2-x-3=0

Answer 1

Look

Answer 2

do u know the quadratic formula?

Answer 3

no

Answer 4

sorry

Answer 5

\[x=\frac{ -b \pm \sqrt{b ^{2} -4(a)(c)} }{ 2(a) }\]

Answer 6

so just plug in the numbers?

Answer 7

where ax^2 + bx + c = 0

Answer 8

b=-1, a=3, c=-3

Answer 9

Yeah

Answer 10

and plug them into the formula

Answer 11

ok thanks! :)

Answer 12

Please do tell us the answer when you finish.

Answer 13

ok but it will be like a month and a half.

Answer 14

maybe more.

Answer 15

Jajaja take your time

Answer 16

1.18 or -.85

Answer 17

i have a test tomorrow on quadratic functions and i just dont get ehm in general.

Answer 18

*them

Answer 19

then well help :D and ill work it out now, 1 sec

Answer 20

ok

Answer 21

sry i got different answers but mine r close to urs, ill show u my working :)

Answer 22

kk :)

Answer 23

sry i made a mistake one sec lol

Answer 24

haha ok

Answer 25

u might have it right :D 1 sec

Answer 26

and for x^2-x=6 i got (3,2)

Answer 27

ur right!

Answer 28

yay lol!how do you find the vertex and symmetry of things?

Answer 29

give me a question and ill show u

Answer 30

y=3x^2+12x+9

Answer 31

The y value for x^2-x=6 i got (3,-2)

Answer 32

u got +2 for the y value, it is -2

Answer 33

oh i see

Answer 34

so since ur asking for the symetry that means u have to draw the curve y=3x^2+12x+9

Answer 35

ok

Answer 36

actually the symetry would be the equation of the line perpendicular to the tangent to the curve at the turning point, u understand that?

Answer 37

yeah

Answer 38

ive never had a symetry question like this though but i think it makes sense

Answer 39

alright... :)

Answer 40

xD

Answer 41

well wish me luck on my test tomorrow i guess.

Answer 42

lol u want me to show u how to do it though?

Answer 43

yeah u just kept typing faces. xD

Answer 44

if they want u to draw it then that should be easy, but to calculate it u need to know the method and lol

Answer 45

ok

Answer 46

ill calculate it then draw it but u'll have to watch how much marks is the question to know exactly wat to do, that is the trick

Answer 47

kay

Answer 48

by the way is that an actually question? find the symetry of y=3x^2+12x+9?

Answer 49

yeah right from the review.

Answer 50

which is no help.

Answer 51

does it have the answer? i want to know if the answer is a drawing of the curve or the equation of the line?

Answer 52

because our math teacher sucks.and apparently thesymmetry is x=-2, but idk the vertex.

Answer 53

ill just ask my dad cuz im being called to dinner.thanks for the help though! bye! :)

Answer 54

:/ ok i was just about to do it but ok if u r going to practice more ill be here :)