1.

12. a*b - a²b + 5ab - 5b​

Answer»

Answer:

(1 - a) (ab - 5B)

Step-by-step EXPLANATION:

ab - a²b + 5AB - 5b

ab (1- a) + 5b (a - 1)

ab (1- a) - 5b (1- a) { common - }

= (1 - a) (ab - 5b)



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