find the value of a if x+6 is a factor of x³×3x²+4x+a
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Step-by-step explanation:
x+6=0
x=-6
x³+ 3x²+ 4x+ a= 0
(-6)³+ 3(-6)²+ 4(-6)+ a= 0
-216+ 108- 24+ a= 0
-132+ a= 0
a= 132
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