JAMB Mathematics 2018 Objective — Question 10
Question 10 of 39 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
Advertisement
The lengths in cm of the sides of a right-angled triangle are x, 3x−1 and 3x+1. Find x
- A. 7
- B. 12Correct
- C. 8
- D. 10
Explanation
The longest side 3x+1 is the hypotenuse: (3x+1)² = x²+(3x−1)² → 9x²+6x+1 = x²+9x²−6x+1 → 12x=x² → x=12 (x≠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.