Question

Can someone please check my work and if its wrong help me get the right answer will give medal (:

Answer 1

How did you arrive at your "guesses"?

Answer 2

Are you guessing or you sure

Answer 3

I am defiantly not sure cause I suck at math so I am guessing from what I read in my lesson

Answer 4

Well just straight outright guessing won't get you anywhere. Of course you're going to be bad at math, that's why you're in school to learn. What would be the point of learning something you were already good at? Haha.

So how are you supposed to solve this, by using the quadratic equation or completing the square or what? Tell me what you know so I can help you understand it to make it easier for you. =)

Answer 5

Um I actually take notes.... its not my fault im stupid and none of it goes into my head and it just comes straight out

Answer 6

Good, so what do your notes say?

Answer 7

on what exactly?

Answer 8

:p

Answer 9

1) I doubt you are stupid
2) what do your notes say about the quadratic formula ?

Answer 10

x = -b ± √b² - 4ac | 2a

Answer 11

Quadratic Formula.

Answer 12

Your terms:

a = 1
b = 5
c = 2

Answer 13

a=1, b= -5, c= -2

Answer 14

Oh, right it wasn't simplified. Sorry

Answer 15

Are you getting any of this @lostintime

Answer 16

x = -b ± √b² - 4ac | 2a
x = -(-5) ± √(-5)² - 4(1)(-2) | 2(1)

Can you simplify that @lostintime ?

Answer 17

Well This Is Going No Where xD

Answer 18

Thank for everything guys but 2 people already helped me through private message and told me my answers were right, I ACTUALLY understood my lesson so I am kinda happy anyway thanks for trying to help me since a lot of you helped idk who to give a medal to lol but wow I actually understood my lesson

Answer 19

LOL

Answer 20

If you REALLY understood your lesson, you wouldn't need anyone to check your work for you.

Answer 21

I didn't know it was right that's why I wanted people to check for me

Answer 22

It doesnt matter atleast she UNDERSTOOD her lesson

Answer 23

stop being mean guys thats not cool

Answer 24

@Too_High_For_Love Thank you <3

Answer 25

ya at least she understood

Answer 26

np

Answer 27

suggestion, if you just need to check answers, use online calculator

wolframalpha.com

Answer 28

@firedragonman @xxraider365 thank you!

Answer 29

Your welcome its wrong for people to say that to you because i have to check my own answers but if you ever need help @johnweldon1993 is a WOUNDERFUL person to talk to(:

Answer 30

np

Answer 31

@dumbcow Thanks for the link (:

Answer 32

Thanks glad you understand (: I actually felt stupid because everyone made it seem like I had done it all wrong when I did it right lol im actually surprised :P

Answer 33

btw your answers were actually wrong

http://www.wolframalpha.com/input/?i=x%5E2+-5x+-2+%3D+0
http://www.wolframalpha.com/input/?i=4x%5E2+%2B12x+%2B3+%3D+0

Answer 34

Your a very smart person dont believe other people believe in yourself and believe that you can do anything you set your mind to

Answer 35

Thats true I guess I listen to people too much and its probably why I fail maybe if I listen to myself for once and believe i me I will succeed

Answer 36

there you go(:

Answer 37

lol i suggest listening to your teacher and reputable tutors on this site

Answer 38

Or do what they say _-_

Answer 39

I am in virtual school and we have live lessons I watch them but they aren't as easy to understand so I stick to the lessons and wait what? Now this is just confusing I need to know if I should go back into my lesson and try again

Answer 40

yes you should

Answer 41

The answers you received are incorrect

Answer 42

virtual school is very hard because its basically self taught but hey dont listen to me im always wrong xD

Answer 43

@Too_High_For_Love I agree with you there

Answer 44

lol you are not wrong it is hard especially when you only get an hour once a week to learn from your teacher and dammit lol i got happy for nothing ): :P

Answer 45

look at @greenlegodude57 posts regarding quadratic formula

Answer 46

That its self taught or dont listen to me im always wrong

Answer 47

lol sorry about virtual school :)

Answer 48

Its fine (: but it helps me with concentrating more than a public school so guess it has its ups and downs

Answer 49

\[\large -x^2 + 5x + 2 = 0\]
Plug this into the quadratic equation

\[\large \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]
a = -1
b = 5
c = 2

So we have
\[\large \frac{-5 \pm \sqrt{(5)^2 - 4(-1)(2)}}{2(-1)}\]
\[\large \frac{-5 \pm \sqrt{25- (-8)}}{-2}\]
\[\large \frac{-5 \pm \sqrt{33}}{-2}\]
and there...the fact that a negative divided by a negative...makes this all positive so

\[\large \frac{5\pm \sqrt{33}}{2}
\]

Answer 50

Thank you let me write this down as an example for later (:

Answer 51

i think i can possibly see where i might have understood wrong

Answer 52

And for 2)

We have

\[\large 4x^2 + 12x + 3 = 0\]
we just added 12x to both sides of the equation to set it = to 0

again plug it into the same equation

\[\large \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]
becomes
\[\large \frac{-12 \pm \sqrt{12^2 - 4(4)(3)}}{2(4)}\]
\[\large \frac{-12 \pm \sqrt{144 - 48}}{8}\]
\[\large \frac{-12 \pm \sqrt{96}}{8}\]

this can be broken into 2 equations
\[\large \frac{-12 + \sqrt{96}}{8}\]
and
\[\large \frac{-12 - \sqrt{96}}{8}\]

We can just plug this into a calculator and get

-2.72 and -0.28

Answer 53

get it

Answer 54

Thank you!!!!! and thanks everyone else i have to log off now ):

Answer 55

take back the medal you gave me and give it to him

Answer 56

@lostintime

Answer 57

she got off

Answer 58

she left

Answer 59

it says shes online

Answer 60

now shes offline xD