Factorise 1) X ²+ 7x + 12 2) 12x² - 7x+1 3)x² - 5x + 6
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Step-by-step explanation:
1)x²+7x+12
=x²+4x+3x+12
=x(x+4)+3(x+4)
=(x+3)(x+4)
2)12x²-7x+1
=12x²-3x-4x+1
=3x(4x-1)-1(4x-1)
=(3x-1)(4x-1)
3)x²-5x+6
=x²-3x-2x+6
=x(x-3)-2(x-3)
=(x-2)(x-3)
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