Question

factorise the following expression by regrouping. 1) ab +4a +3b +12​

Answer 1

Step-by-step explanation:

a(b+4)+3(b+4)

so the answer is

(a+3)(b+4)

Answer 2

Given :-

Factorise the following expression by regrouping. 1) ab +4a +3b +12

Solution :&

First of all , place the expressions to the required groups

➝ ( ab + 3b ) ( 4a + 12 )

[ taking Commons out ]

➝ b ( a + 3 ) 4 ( a + 3 )

➝ ( b + 4 ) ( a + 3 ) Ans !

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