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प्रश्न
Factorize each of the following expression:
a2 − b2 + a − b
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उत्तर
\[a^2 - b^2 + a - b = ( a^2 - b^2 ) + (a - b)\] [Grouping the terms]
\[ = (a + b)(a - b) + (a - b)\]
\[ = (a - b)(a + b + 1)\] [Taking out the common factor (a - b)]
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