Mind the Mistake, Mend the Mistake
Last updated at July 23, 2026 by Teachoo
Transcript
Question 3 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? Yes What went wrong? The student confused this with squaring. They saw y and (y + 2) and somehow turned it into (y + 2)2. We must follow the Order of Operations (BODMAS): Multiply first, then add. Correct solution y+2(y+2) =𝒚+𝟐 × 𝒚+𝟐 × 𝟐 =𝑦+2𝑦+4 =𝟑𝒚+𝟒