Question

if x+4 is a factor of polynomial x^2+ 3x +m, find the value of m

answer in detail

Answer 1

$f{x} = x {?}^{2} + 3 x+ m$
$f{ - 4} = - 4 ^{2} + 3 \times - 4 + m = 0$
m=
$16 - 12 + m = 0$
m
$m = - 4$