factorise ( 2x -3 )² - 8x + 12
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Step-by-step explanation:
Using identity=(a-b)²=a²+b²-2ab
=(2x-3)²-8x+12=(2x)²+(3)²-2(2x)(3)-8x+12
=4x²+9-12x-8x+12
=4x²+9+12-12x-8x
=4x²+21-20x
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