2xsquare + 11x - 21 factorise the question
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= 2x.2+11x-21
= 2x.2+14x-3x-21 → by mid term splitting
= [2x.2+14x]-[3x+21]
= 2x[x.2+7]-3[x+7]
= [2x-3][x.2+7]
= 2x.2+14x-3x-21 → by mid term splitting
= [2x.2+14x]-[3x+21]
= 2x[x.2+7]-3[x+7]
= [2x-3][x.2+7]
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