if -1 is a zero of the polynomial p(x) = axcube -x²+x+4 find the value of a
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p(x)=ax3 - x2 + x + 4
As -1 is the zero of p(x)
p(1)=a(1)3-(1)2+(1)+4=0
a-1+1+4=0
a=0-4
[a=-4]
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