Question

(x + 2).(x2 - x - 2) =...me ajudem pfvr '-'​

Answer 1

:= (x + 2).(x² - x - 2)

= x.x² + x.(- x) + x.(-2) + 2.x² + 2.(-x) + 2.(-2)

= x³ - x² - 2x + 2x² - 2x - 4

= x³ - x² + 2x² - 2x - 2x - 4

     3      2

= x   + x   - 4x - 4