Question

regroup and factories ab+4a-3ab-12

Answer 1

ab+4a-3ab-12
= 4a-3ab+ab-12
=4a-2ab-12
Simplifying 2
=2a-ab-6 or
=a(2-b)-6=0
2-b-6=0/a
2-b-6=0
-b=-2+6
-b=4
b= -4
Hope you got it