Question

factor completely (4x^2+28x-36)

Answer 1

I got so far 4(x^2+7-9) is that right? @AkashdeepDeb

Answer 2

Yes that is good!
4(x^2+7x-9)
Now find 2 numbers that add/subtract to +7 and multiply to give -9.

Answer 3

there is none? lol im so confused.

Answer 4

Yes that's right.
Do you know the Quadratic formula by any chance?

Answer 5

I probably do but not right off the top of my head

Answer 6

\[\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]
Ring a bell?

Answer 7

no.... lol

Answer 8

hehe.

I don't really find any straight way to do this.
Hold on let me see.

Answer 9

thanks for trying

Answer 10

This is the actual answer for this question! LOL ^_^

http://www.wolframalpha.com/input/?i=4x%5E2%2B28x-36

Answer 11

I have another one and im confused once again

Answer 12

3y^2-36y-63

Answer 13

Take 3 common.

Answer 14

all I got was 3(y^2-12-21)

Answer 15

Again!
You HAVE to use the Quadratic Formula.
http://www.wolframalpha.com/input/?i=3y%5E2-36y-63

Answer 16

okay.

Answer 17

I got the answer, it was just 3(y^2-12y-21)

Answer 18

HAHAHAHHA LOL!! :D

Normally, we simplify it down EVEN further but Yeah, even your answer is FACTORISED!! :D

Answer 19

lol thank you! for helping me tho

Answer 20

:)