Question 2 (i) - Algebra Identities - Identity IV - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at April 16, 2024 by

Ex 9.5, 2 - Use the identity (x + a) (x + b) = x^2 + (a + b) x + ab to

 

 

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Question 2 Use the identity (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 to find the following products. (i) (𝑥+3) (𝑥+7) (𝑥+3) (𝑥+7) (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 Putting 𝑎 = 3 & 𝑏 = 7 = 𝑥^2+(3+7)𝑥+(3×7) = 𝒙^𝟐+𝟏𝟎𝒙+𝟐𝟏

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