Facorise xsquare=2x-63
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x² + 2x -63
= x² +9x -7x -63
=x(x+9) -7(x+9)
=(x+9)(x-7)
= x² +9x -7x -63
=x(x+9) -7(x+9)
=(x+9)(x-7)
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