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Ex 12.2, 1 - Chapter 12 Class 7 Algebraic Expressions - Part 6

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Ex 12.2, 1 Simplify combining like terms: (vi) (3y2 + 5y – 4) – (8y – y2 – 4) (3y2 + 5y – 4) – (8y – y2 – 4) = 3y2 + 5y – 4 – 8y + y2 + 4 = 3y2 + y2 + 5y – 8y – 4 + 4 = y2 (3 + 1) + y (5 – 8) + (– 4 + 4) = y2 (4) + y (–3) + (0) = 4y2 – 3y

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