Question

Formula of x square + Y square + what is the formula of x cube + y cube + Z cube

Answer 1

x²+y²= (x+y)(x-y) this is. the formula of x²+y²

HOPE it helps u

Answer 2

1). x^2 +y^2 = (x+ y) (x-y)

2). the data is incomplete in second one

your question must be

this ==> x3 + y3 + z3 - 3xyz 

and answer of it is

  =  (x + y + z)(x2 + y2 + z2 - xy - yz - zx

if you arestill not cleared ask in comment section.