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X-1-(x-1)^2+ax-a factorise it so that the answer can be (x-1)(2-x+a) |
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Answer» we have x-1-(x-1)^2+ax-a =(x-1){1-(x-1)+a} =(x-1){1-x+1+a} =(x-1)(2+a-x) |
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