WAEC Mathematics 2018 Objective — Question 35
Question 35 of 50 from the West African Examinations Council (WAEC) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
Advertisement
Factorise completely the expression (x+2)² − (2x+1)²
- A. (3x+2)(1−x)
- B. (3x+2)(2x+1)
- C. 3(x+2)²
- D. 3(x+1)(1−x)Correct
Explanation
Using difference of two squares: [(x+2)+(2x+1)][(x+2)−(2x+1)] = (3x+3)(1−x)=3(x+1)(1−x).
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.