find the value of a if x +6 is a factor of x³+3x²+4x+a
Answers
Answered by
4
Answer:
f(x) = x³+3x²+4x+a
g(x)= x+6
x= -6
f(-6)= ( -6)³+3(-6)²+4(-6)+a = 0
f(-6)= - 18 + 36-24+a = 0
f(-6) = - 42 +36+a = 0
-42+36+a = 0
-6+a = 0
a = 6
Similar questions