Question

Factor Completely:
18x2 - 32y2

Answer 1

-4 (8 y^2-9)

Answer 2

Or
36-32 y^2
2 (3 sqrt(2)-4 y) (4 y+3 sqrt(2))

Answer 3

a) 2(9x2 - 16y2)
b) 2(3x + 4y)(3x - 4y)
c) (9x - 16y)(2x + 2y)
d) Can't be factored.

Answer 4

a

Answer 5

a is identical to my first reply

Answer 6

b. if you multiply out b you get the result.

Answer 7

is it a or b

Answer 8

http://www.wolframalpha.com/input/?i=factor18x2+-+32y2

Answer 9

http://www.wolframalpha.com/input/?i=2%289x2+-+16y2%29

Answer 10

they are the same

Answer 11

It's b. 9x^2 - 16y^2 is the difference of two squares. (3x+4y)(3x-4y)

Answer 12

but because the question asks you to factor completely you want b.

Answer 13

the original expression is 18x2 - 32y2

Answer 14

o

Answer 15

so the first step is to factor out the 2:
2(9x^2 - 16y^2)
and then factor the second part as I mentioned above.

Answer 16

ah I see what you did gotcha. Yes B is more accurate.

Answer 17

I didn't simplify the first factorization I gave correctly.

Answer 18

-4 (8 y^2-9) and 2(3x + 4y)(3x - 4y) are the same