Ex 12.2, 1 - Chapter 12 Class 7 Algebraic Expressions - Part 3

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Transcript

Question 1 Simplify combining like terms: (iii) p – (p – q) – q – (q – p) p – (p – q) – q – (q – p) = p – p + q – q – q + p = p – p + p + q – q – q = p(1 – 1 + 1) + q (1 – 1 – 1) = p(0 + 1) + q (0 – 1) = p(1) + q (–1) = p – q

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