Question

Find the value if m,if
$x + 4$
is a factor of the polynomial
$x2 + 3x + m$
​

Answer 1

$\bold{x+4 \: is \: factor \: of \: x^2+3x+m}$

x+4=0

x=−4 is zero of polynomial

Put it in polynomial

$\bold{(−4)^2+3(−4)+m=0}$

16−12+m=0

m=−4