Question

Разложите на множители многочлены(15.11)

Answer 1

1) $(frac{2}{3}xy - 1)xy - (1 -  frac{2}{3}xy) = (frac{2}{3}xy - 1)xy - (-1(frac{2}{3}xy - 1) =\(frac{2}{3}xy - 1)xy + (frac{2}{3}xy - 1) = (frac{2}{3}xy - 1)(xy + 1)$

2)$(frac{4}{9}x - y) frac{4}{9} - y(y -  frac{4}{9}x) = (frac{4}{9}x - y) frac{4}{9} + y(frac{4}{9}x - y) = (frac{4}{9}x - y)(frac{4}{9} + y)$