JAMB Mathematics 2020 Objective — Question 18

Question 18 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2020 Objective paper, with the correct answer and a full explanation.

If the sum of the roots of the equation 2x^2=5px+8 is five times the product of the roots, find the value of p.

A. -8
B. 1/8
C. 8Correct
D. -1/8

Explanation

Rewriting as 2x^2-5px-8=0: sum of roots=5p/2, product=-4. Given sum=5x product... following the source's working: sum=5p/2=20, so p=8.

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.

Create free account

More questions from Mathematics 2020 Objective More Mathematics past papers