Factorise -x 2 +5x-6
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-x² +5x -6
= -x² +3x +2x -6
= -x(x-3) +2(x-3)
=(x-3)( -x +2)
=(x-3)(2-x)
= -x² +3x +2x -6
= -x(x-3) +2(x-3)
=(x-3)( -x +2)
=(x-3)(2-x)
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