Question

x^2+9xy-36y^2 factor

Answer 1

you need to find 2 terms whose product is -36 and when added give -9
can you think of them?

Answer 2

* 2 numbers

Answer 3

9 and 4

Answer 4

the factors will be of the form
( x +/- _y)(x +/1 _y)
where the numbers replace the blanks

Answer 5

no afraid not 9*4 = 36 ( not -36 ) and 9+4 = 13

Answer 6

so what is it

Answer 7

-9 and 4?

Answer 8

no - they are correct for -36 but -9 + 4 = -5
think of 2 different numbers

Answer 9

(x-9) x+12)?

Answer 10

these 2 are nearly correct

-12 and 3

can you see whats wrong?

Answer 11

(x-3) (x+12)?

Answer 12

yes

Answer 13

thanks

Answer 14

but theres x and y involved

correct is

( x + 12y(x - 3y)

Answer 15

yw