144-24x+x^2 factorise
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144-24x+x²
=144-12x-12x+x²
=12(12-x) -x(12-x)
=(12-x) (12-x)
=(12-x) ²
=144-12x-12x+x²
=12(12-x) -x(12-x)
=(12-x) (12-x)
=(12-x) ²
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