Question

Разложить на множители многочлен x^3+x^2y-xy^2-y^3 при x=7.37 y=2.63

Answer 1

X³+x²y-xy²-y³ =
(x³-y³)+(x²y-xy²) =
(x-y)*(x²+xy+y²)+xy*(x-y) =
(x-y)*(x²+xy+y²+xy) = 
(x-y)*(x²+2xy+y²) = (x-y)*(x+y)²
при x=7.37
y=2.63
(7,37-2,63)*(7,37+2,63)² =
4,74*100 = 474