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Question

Find the zeroes of the polynomial: 6x35x23x+2=0

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Solution

Sum of the co efficients of x3,x2,x and the constant = 6-5-3+2 = 0

So for x = 1 is one of the roots of the expression.

(x-1) is one factor. To find the remaining, divide 6x35x213x+2 by (x-1)
we get,

6x35x23x+2
=(x1)(6x2+x2)
=(x1)(6x2+4x3x2)
=(x1)[2x(3x+2)1(3x+2)]
=(x1)(2x1)(3x+2)
so zeros of 6x35x23x+2 are 1, 12, 23

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