Question

Descompuneti in factori , aplicand formula a^2-b^2 = (a+b)(a-b). i) x^8-y^8

Answer 1

x^8-y^8= (x^4+y^4)(x^4-y^4)

Answer 2

(x⁴)²-(y⁴)²=(x⁴+y⁴)(x⁴-y⁴)=(x⁴+y⁴)(x²+y²)(x²-y²)=(x⁴+y⁴)(x²+y²)(x+y)(x-y)