Question

а^4-б^4
-------- помогите очень надо
а^2+б^2

Answer 1

$frac{a ^{4}-b ^{4} }{a ^{2}+b ^{2} }= frac{(a ^{2}-b ^{2})(a ^{2}+b ^{2} ) }{a ^{2}+b ^{2} }=a^{2}-b ^{2}$