Question

2x(x - 1)² -2x² (x - 1)

(x + 2) (x - 1)²

(x - 2)² . (x + 4)²

resolva 15 pontos

Answer 1

2x (x - 1)² -2x² (x - 1) = 
= 2x . (x² - 2x + 1) - 2x³ + 2x² = 
= 2x³  - 4x² + 2x - 2x³ + 2x² = 
= -2x² + 2x

(x + 2) (x - 1)² = (x+2) (x² - 2x + 1) =
= x³ - 2x² + x + 2x² - 4x + 2 =
= x³ - 3x + 2

(x - 2)² . (x + 4)² = (x² - 4x + 2) (x² + 8x +16) =
 = x⁴ + 8x³ + 16x² -4x³ - 32x² - 64x + 2x² + 16x + 32 =
= x⁴ + 4x³ -14x² - 48x + 32