verify:
(i)x3+y3=(x+y) (x2 -xy+y2)   (ii)x-y=(x+y) (x2+xy+y2)

i.RHS = x+yx2-xy+y2=xx2-xy+y2 + yx2-xy+y2=x3-x2y+xy2+x2y-xy2+y3=x3+y3=LHSii.RHS = x-yx2+y2+xy=xx2+y2+xy - yx2+y2+xy=x3+xy2+x2y-x2y-y3-xy2=x3-y3=LHS

  • 1
What are you looking for?