Question 2 (vi) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities
Last updated at April 16, 2024 by Teachoo
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Last updated at April 16, 2024 by Teachoo
Question 2 Use the identity (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 to find the following products. (vi) (2𝑎^2+9) (2𝑎^2+5) (2𝑎^2+9) (2𝑎^2+5) (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 Putting 𝑥 = 2𝑎^2 , 𝑎 = 9 & 𝑏 = 5 = (2𝑎^2 )^2+(9+5)(2𝑎^2 )+(9)(5) = (2^2×𝑎^(2 × 2) )+(14×2) 𝑎^2+45 = 𝟒𝒂^𝟒+𝟐𝟖𝒂^𝟐+𝟒𝟓