x²y+xy²+x³+y³=xy(x+y) + (x+y)(x²-xy+y²)=(x+y)(xy+x²-xy+y²)=
=(x+y)(x²+y²)
(A³+B³=(A+B)(A²-AB +B²))
8x-38-20x+95+6=0
-12x+63=0
-12x=-63
x=5.25