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Ex 12.2, 2 - Chapter 12 Class 7 Algebraic Expressions - Part 5

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Ex 12.2, 2 Add: (v) 14x + 10y – 12xy – 13, 18 – 7x – 10y + 8xy, 4xy (14x + 10y – 12xy – 13) + (18 – 7x – 10y + 8xy) + (4xy) = 14x + 10y – 12xy – 13 + 18 – 7x – 10y + 8xy + 4xy = 14x – 7x + 10y – 10y – 12xy + 8xy + 4xy – 13 + 18 = x (14 – 7) + y (10 – 10) + xy (–12 + 8 + 4) + (18 – 13) = x (7) + y (0) + xy (–12 + 12) + (5) = 7x + xy (0) + 5 = 7x + 5

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