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