Question 2 - Page 140 - Distributive Property - Chapter 6 Class 8 - We Distribute yet things Multiply (Ganita Prakash)

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[Class 8 Maths] Expand - (i) (a – u) (b + v) (ii) (a – u) (b – v). - Distributive Property

part 2 - Question 2 - Page 140 - Distributive Property - Chapter 6 Class 8 - We Distribute yet things Multiply (Ganita Prakash) - Class 8 (Ganita Prakash - 1, 2 & Old NCERT)

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Question 2 - Page 140 Expand (i) (a – u) (b + v) (ii) (a – u) (b – v). Let’s do one by one (i) (a – u) (b + v) Now, (𝒂−𝒖)(𝒃+𝒗)=𝑎 (𝑏+𝑣)−𝑢(𝑏+𝑣) =𝑎𝑏+𝑎 × 𝑣+(−𝑢)× 𝑏+(−𝑢) × 𝑣 =𝒂𝒃+𝒂𝒗−𝒖𝒃−𝒖𝒗 (ii) (a – u) (b – v) Now, (𝒂−𝒖)(𝒃−𝒗)=𝑎 (𝑏−𝑣)−𝑢(𝑏−𝑣) =𝑎𝑏+𝑎 × (−𝑣)+(−𝑢)× 𝑏+(−𝑢) × (−𝑣) =𝒂𝒃−𝒂𝒗−𝒖𝒃+𝒖𝒗

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