Question

correctly factor 9x^2-60xy+100y^2

Answer 1

can i wrongly factorize it for u? ;p

Answer 2

-__- that wouldn't really be helpful, thanks.

Answer 3

haha ok ill be helpful then :P

Answer 4

I've given up. I don't know what to do..

Answer 5

ill talk it through with u dont worry :) u know how to facotorize right?

Answer 6

factorize*

Answer 7

yes I know how to factorize. the -60xy is throwing me off though.

Answer 8

and thanks! :)

Answer 9

i always start off like this
(x + )(x + )

Answer 10

since the first two must multiply to get 9x^2, wat would u put to be the coefficients of the two x's?

Answer 11

2? since it's two x's right or no?

Answer 12

well 2x*2x = 4x^2
u want them to = 9x^2 so try again :)

Answer 13

3x*3x=9x^2

Answer 14

i agree, let try that and see if we get it and if we dont then we can try x*9x = 9x^2

So we got, (3x + )(3x + ) and according to 9x^2-60xy+100y^2, the last two numbers must multiply to get 100y^2. but how do u think we will get the y's?

Answer 15

10y*10y would equal out to 100y^2 so I suppose 10y*10y

Answer 16

ok then we'll try that =) (3x + 10y)(3x + 10y) ok now expand it and see if u get 9x^2-60xy+100y^2. if not u can try changing it from +10y to negative 10y and hope that works :P

Answer 17

Alright thank you soo much for all of your help! :)

Answer 18

wait! did it expand to get 9x^2-60xy+100y^2?????

Answer 19

I got it figured out, I made it work.

Answer 20

just making sure u got (3x - 10y)(3x - 10y) cause this is the answer not(3x + 10y)(3x + 10y) :)

Answer 21

or u can say (3x - 10y)^2 :)