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Ex 12.2, 3 - Chapter 12 Class 7 Algebraic Expressions - Part 3

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Ex 12.2, 3 Subtract: (iii) (a – b) from (a + b) (a + b) − (a − b) = a + b − a + b = a − a + b + b = a (1 − 1) + b (1 + 1) = a (0) + b(2) = 0 + 2b = 2b

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