factorise 2x square + 14 x + 20
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2x^2 +14x +20
we have to find a number such that pq=40 , p+q =14 So the number is 10 and 4
2x^2+10x +4x +20
2x(x+5)+4(x+5)
(2x+4)(x+5)
So the Factorise of 2x^2+14x+20 = (2x+4)(x+5)
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