Question

3) Simplifique as expressões algébricas: a) (x – y)² + 2x – x(x – 2y) = b) (x – 2)² + 3(x + 1)(2x – 3) – 1 =

Answer 1

Resposta:

Explicação passo-a-passo:

a) (x-y)^2 + 2x - x(x - 2y) = $x^{2} -2xy + y^{2}$$+ 2x - x^{2} + 2xy$ = $y^{2} + 2x$

b)(x-2)^2 + 3(x + 1)(2x-3) - 1 = $x^{2} -4x + 4 + 3(2x^{2} -3x + 2x - 3) - 1 = x^{2} -4x + 3 + 3(2x^{2} -x - 3) = x^{2} -4x + 3 + 6x^{2} -3x - 9 = x^{2}+ 6x^{2} -4x -3x + 3 - 9 = 7x^{2} -7x - 6$