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Example 9 (i) - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at May 29, 2023 by

Example 9 - Multiply (i) (a + 7) and (b - 5) (ii) (a^2 + 2b^2) and

 

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Transcript

Example 9 Multiply (i) (𝑎+7) and (𝑏−5) (𝑎+7)×(𝑏−5) = 𝑎(𝑏−5)+7(𝑏−5) = (𝑎×𝑏)−(𝑎×5)+(7×𝑏)−(7×5) = 𝒂𝒃−𝟓𝒂+𝟕𝒃−𝟑𝟓

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