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Examine whether x+2is a factor of x^3+3x...

Examine whether `x+2`is a factor of `x^3+3x^2+5x+6`and of `2x+4`.

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By factor theorem,if the value of polynomial p(x) is zero at
x=c, then g(x)=x−c is a factor of p(x).
Given` p(x)=x ^ 3 +2x ^ 2 +3x+6 `and `g(x)=x+2`
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