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Ex 12.2, 2 - Chapter 12 Class 7 Algebraic Expressions - Part 4

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Ex 12.2, 2 Add: (iv) a + b – 3, b – a + 3, a – b + 3 (a + b – 3) + (b – a + 3) + (a – b + 3) = a + b – 3 + b – a + 3 + a – b + 3 = a – a + a + b + b – b –3 + 3 + 3 = a (1 – 1 + 1) + b (1 + 1 – 1) + (–3 + 3 + 3) = a (0 + 1) + b (2 – 1) + (–3 + 6) = a (1) + b(1) + (6 – 3) = a + b + 3

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