if x+2 is a factor of x^3+ax^2-x+30 find the value of a
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Answer:
a=(-6)
Step-by-step explanation:
x+2=0-->x=(-2)
x³+ax²-x+30=0
Substitute x=(-2) in the equation
(-2)³+a(-2)²-(-2)+30=0
(-8)+4a+2+30=0
4a+2+30+(-8)=0
4a+24=0
4a=(-24)
a=(-24)/4
a=(-6)
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