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Question

Using synthetic division determine which of these is a factor of the polynomial 6x3−19x2+16x−4.

A
(x3)
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B
(x+3)
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C
(x2)
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D
(x+2)
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Solution

The correct option is C (x2)
let f(x)=6x319x216x4
We generally find the first zero of polynomial by hit and trial method .
Put x=1
f(1)=619+164=1
So x=1 is not the zero of f(x)
Now Put x=2
f(2)=4876+324=0
So x=2 is a zero of f(x)
(x2) is a factor of f(x)
So option C is correct.

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