Question

Find the value of a if x+6 is a factorof xcube +3x square+a

Answer 1

Answer:

a=132

Step-by-step explanation:

Since x+6 is a factor

x+6=0

x=-6

(-6)³+3(-6)²-24+a=0

-216+108-24+a=0

-132+a=0

a=132