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Ex 12.2, 3 - Chapter 12 Class 7 Algebraic Expressions - Part 5

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Ex 12.2, 3 Subtract: (v) –m2 + 5mn from 4m2 – 3mn + 8 (4m2 – 3mn + 8) – (–m2 + 5mn) = 4m2 – 3mn + 8 + m2 – 5mn = 4m2 + m2 − 3mn − 5mn + 8 = m2 (4 + 1) – mn (3 + 5) + 8 = m2 (5) – mn (8) + 8 = 5m2 − 8mn + 8

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