Question

Find the value of a when g(x) is a factor of p(x).
(1) g(x)= x +1 ; p(x)= x² + ax + 2​​

Answer 1

Answer:

$x + 1 = 0 \\ x = - 1 \\ {x}^{2} + ax + 2 = 0 \\ ( - 1) {}^{2} + a( - 1) + 2 = 0$

$1 - a + 2 = 0 \\ - a = - 3 \\ a = 3$