Question

multiply.
(x^2+y^4)(x^2-y^4)
so far I got.
x^4-x^2y^4+y^4x^2-y^8

Answer 1

None. Try to use FOIL or box method.

Answer 2

FOIL:

First
Outer
Inner
Last

Answer 3

i did and that was what I got.

Answer 4

would it be x^4-y^4 since x^2y^4 cancel out?

Answer 5

Well, where did the last two terms, y^2x^2 and y^4, come from?

Answer 6

First two is correct. Not last two.

Answer 7

y^8 sorry

Answer 8

agh! I meant y^4x^2-y^8

Answer 9

x^4-x^2y^4+y^4x^2-y^8

Answer 10

Perfect. Good job

Answer 11

so that's my answer?

Answer 12

Yeah.

Answer 13

awesomeee!!! thank you for your help!!

Answer 14

you're welcome :)