Question

subtract asubtract a square minus b square from a square + b square ​

Answer 1

$a ^{2} + b^{2} - (a ^{2} - b ^{2} ) \\ a ^{2} + b ^{2} - a ^{2} + b ^{2} \\ b ^{2} + b ^{2} \\ 2b ^{2}$

this is correct answer