Factor a polynomial question
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Factor a polynomial question

[From: ] [author: ] [Date: 13-02-03] [Hit: ]
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Factor the polynomial (x-5)(x+6)^2-(x-5)^2(x+6). Your answer can be written as A(x+B)(x+C) with integers A, B,C and B
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(x-5)(x+6)^2-(x-5)^2(x+6)
= (x-5)(x+6)(x+6) - (x-5)(x+6)(x-5)
= (x-5)(x+6)((x+6) - (x-5))
= (x-x+6+5)(x-5)(x+6)
= 11(x-5)(x+6)

A = 11

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(x-5)(x+6)^2 - (x-5)^2(x+6) =
(x-5)(x+6)(x+6) - (x-5)(x-5)(x+6) =
[x+6 - x +5](x-5)(x+6)=
11(x-5)(x+6)

a = 11

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(x - 5)(x + 6)[x + 6 - (x - 5)] = (x - 5)(x + 6)
A is just 1.
1
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