Algebra Identities and Formulas

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Chapter 8 Class 8 Algebraic Expressions and Identities
Serial order wise

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

 

 

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Transcript

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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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.