Question

розкладіть на множники вираз
$2ab \times (x - y) { }^{2} - ab \times (x + y)$
Дам 25 б​

Answer 1

$ab \times (2(x - y) {}^{2} - (x + y)) \\ ab \times (2(x {}^{2} - 2xy + y {}^{2} ) - x - y) \\ ab \times (2x {}^{2} - 4xy + 2y {}^{2} - x - y)$

Answer 2

$\displaystyle 2ab(x-y)^2-ab(x+y)=ab(2(x-y)^2-(x+y))=ab(2(x^2-2xy+y^2)-x-y)=\\ \\ ab(2x^2-4xy+2y^2-x-y)$