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Question

Using factor theorem, show that g(x) is a factor of p(x), when
p(x)=2x4+9x3+6x211x6,g(x)=x1

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Solution

p(x)=2x4+9x3+6x211x6g(x)=x1x=1

If p(x) is a multiple of g(x), the remainder will be zero.

p(1)=2(1)4+9(1)3+6(1)211(1)6=2+9+6116=0

Therefore p(x) is a multiple of g(x)


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