x² - 2x²-x+2 factorise this
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SEE THAT THERE ARE TWO PHOTOS
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x²-x-2x²+2
=(x²-x)(-2x²+2)
=x(x-1)-2(x²-1)
=x(x-1)-2(x+1)(x-1)
=(x-1)(x-2)(x+1)
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