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Question

Resolve each of the following quadratic trinomial into factor:
6x2 − 13xy + 2y2

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Solution

The given expression is 6x2-13xy+2y2. (Coefficient of x2=6, coefficient of x=-13y and constant term=2y2)We will split the coefficient of x into two parts such that their sum is -13y and their product equals the product of the coefficient of x2 and the constant term, i.e., 6×(2y2)=12y2.Now,(-12y)+(-y)=-13y and(-12y)×(-y)=12y2Replacing the middle term -13xy by -12xy-xy, we get: 6x2-13xy+2y2= 6x2-12xy-xy+2y2 =(6x2-12xy)-(xy-2y2) =6x(x-2y)-y(x-2y) =(6x-y)(x-2y)

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