Question

check whether x+7 is a factor of x^(2) + 4x-24, give reason

Answer 1

Answer:

f(x) = x^2 + 4x- 24

x+7 =0

x = -7

f(-7) = (-7)^2 + 4(-7) -24

= 49-28-24

= 49-52

= -3

x+7 is not a factor of f(x).