Question

(X-y)ao quadrado -x (x-2y) expressao algebica

Answer 1

= (x - y)² - x.(x - 2y)

= x² - 2xy + y² - x.x - x.(-2y)

= x² - 2xy + y² - x² + 2xy 

= x² - x² - 2xy + 2xy + y²

= 0 + 0 + y²

= y²