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Question
The factors of a2+b−ab−a are __________
The factors of a2+b−ab−a are __________
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Solution
The correct option is A (a - b) (a - 1)
a2+b−ab−a
=a2−a+b−ab
= a(a−1)+b(1−a)
= a(a−1)−b(a−1)
= (a−b)(a−1)
(a - b) (a - 1)
a2+b−ab−a
=a2−a+b−ab
= a(a−1)+b(1−a)
= a(a−1)−b(a−1)
= (a−b)(a−1)
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