Q. 5 A5.0( 2 Votes )

Factorize :

x2 + 7x + 12

Answer :

Given x2 + 7x + 12


Using (x + a)(x + b) = x2 + (a + b)x + ab … (I)


x2 + 7x + 12= x2 + (4 + 3)x + (4)×3


On comparing with (I),


a = 4 and b = 3


So, x2 + 7x + 12= (x + 4)(x + 3)


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