Question

F(x) = – 2(x + 1)(2 – x)

Answer 1

$f(x) = - 2(x + 1) \times (2 - x) \\ 0 = - 2(x + 1) \times (2 - x) \\ - 2(x - 1) \times (2 - x) = 0 \\ ( x + 1) \times (2 - x) = 0$

$x + 1 = 0 \\ 2 - x = 0 \\ \\ x = - 1 \\ x = 2$