1. Group and factorise the following algebraic expressions
ab + 4a-3b- 12
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Answer:
(a-3) (b+4)
Step-by-step explanation:
ab + 4a -3b -12
= 4a + ab - 3b -12
=a(4 + b) - 3(b + 4)
=(a - 3) (b + 4)
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