Question

Stie cineva descompunerea lui x^4-y^4=(x-y)(?) ??

Answer 1

$x^4-y^4=(x^2-y^2)(x^2+y^2)=(x-y)(x+y)(x^2+y^2). \\ \\ Am~folosit:~(a^2-b^2=(a-b)(a+b).$

Answer 2

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