#1**+1 **

1st question:

The first blank is the factored out form of \((x^2 - y^2)^2\), which is \(x^4 -2x^{2}y^2 + y^4\).

The second blank is achieved by combining like terms. \(2x^4 - 2x^{2}y^2 + 2y^2\).

The third blank is just factoring \(2x^4 - 2x^{2}y^2 + 2y^2\) into \(2(x^4 - x^{2}y^2 + y^2)\) by taking out \(2\).

I solved the second one 1 day ago...

1) Distributive Prop

2) Division Prop of =

3) Multipliation Prop of =

Hope this helps,

- PM

PartialMathematician Dec 17, 2018