Question

can anyone show me how we got this?
plz help me? it's my second question and I have got no answer for any of them.
plz plz plz help.

Answer 1

See the above attachment for the answer.
And plz make me as Brainliest !

Answer 2

$(  x^{2} + y^{2} ) ^{2}  = ( x^{4} + y^{4} + 2 x^{2} y^{2} )\\\\x^{4} + y^{4} = (x^{2} - y^{2} )^{2} + 2x^{2} y^{2} \\\\Substitute\\\\(x^{2} - y^{2})^{2} + 2x^{2} y^{2} + 2x^{2} y^{2} = (x^{2} - y^{2})^{2} + (2 x^{2} y^{2}) x^{2}$

Hope this helps!