Question

factor of: 16(a+b)^2-25(x-y)^2

Answer 1

\[m^2-n^2=(m-n)(m+n)\]

Answer 2

how?

Answer 3

\[(m-n)(m+n)=m^2-nm+nm-n^2=m^2-n^2\]

Answer 4

thank you, how about x^4+2x^2y^2+81y^4?

Answer 5

please help

Answer 6

let
x^2= u
y^2= w

Answer 7

i don't ge it

Answer 8

*get

Answer 9

start like this \[x^4+2x^2y^2+81y^4=u^2+2uw+(9w)^2\]