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Ex 9.4, 3 (ii) - Simplify (a^2 + 5) (b^3 + 3) + 5 - Chapter 9 Class 8

Ex 9.4, 3 (ii) - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 2


Transcript

Ex 9.4, 3 Simplify. (ii) (𝑎^2+5) (𝑏^3+3)+5 Here, there are 2 expressions: 1st expression = (𝑎^2+5) (𝑏^3+3) 2nd expression = 5 Solving 1st expression (𝑎^2+5) (𝑏^3+3) = 𝑎^2 (𝑏^3+3)+5(𝑏^3+3) = (𝑎^2×𝑏^3 )+(𝑎^2×3)+(5×𝑏^3 )+(5×3) = 𝑎^2 𝑏^3+3𝑎^2+5𝑏^3+15 Now, our expression is (𝑎^2+5) (𝑏^3+3)+5 = 𝑎^2 𝑏^3+3𝑎^2+5𝑏^3+15+5 = 𝒂^𝟐 𝒃^𝟑+𝟑𝒂^𝟐+𝟓𝒃^𝟑+𝟐𝟎

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.