WAEC Mathematics 2015 Objective — Question 12
Question 12 of 50 from the West African Examinations Council (WAEC) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
Advertisement
Ada draws the graphs of y=x²−x−2 and y=2x−1 on the same axes. Which of these equations is she solving?
- A. x²−x−3=0
- B. x²−3x−1=0Correct
- C. x²−3x−3=0
- D. x²+3x−1=0
Explanation
At the point(s) of intersection, x²−x−2 = 2x−1, so x²−x−2−2x+1=0, giving x²−3x−1=0.
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.