ab - a - b + 1 factorise
please tell me step-by-step
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Answer:
a(b-1)-(b-1)
(a-1)(b-1)
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Answer:
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Step-by-step explanation:
ab - a - b + 1 = a ( b - 1 ) - 1 ( b - 1 )
= (a - 1)(b - 1)
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