Question 5 - Mind the Mistake, Mend the Mistake - Chapter 6 Class 8 - We Distribute yet things Multiply (Ganita Prakash)

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Question 5 We have expanded and simplified some algebraic expressions below to their simplest forms. (i) Check each of the simplifications and see if there is a mistake. (ii) If there is a mistake, try to explain what could have gone wrong. (iii) Then write the correct expression.Is there a mistake? No Explanation The student correctly applied the formula (a – b)2 = a2 – 2ab + b2 Let’s expand this (−𝑞+2)^2 =(𝟐−𝒒)^𝟐 Using (a – b)2 = a2 – 2ab + b2 =2^2−2 × 2 × 𝑞+𝑞^2 =4−4𝑞+𝑞^2 =𝐪^𝟐−𝟒𝐪+𝟒