Find the quadratic equation whose roots are c and -c
MATHEMATICS
WAEC 2008
Find the quadratic equation whose roots are c and -c
- A. x2 - c2 = 0
- B. x2 + 2cx = 0
- C. x2 + 2cx + c2 = 0
- D. x2 - 2cx + c2 = 0
Correct Answer: A. x2 - c2 = 0
Explanation
Roots; x and -c
sum of roots = c + (-c) = 0
product of roots = c x -c = -c2
Equation; x2 - (sum of roots) x = product of roots = 0
x2 - (0)x + (-c2) = 0
x2 - c2 = 0
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *