Solve the equation: 3a + 10 = a 2
MATHEMATICS
WAEC 1991
Solve the equation: 3a + 10 = a2
- A. a = 5 or a = 2
- B. a = -5 or a = 2
- C. a = 10 or a = 0
- D. a = 5 or a = -2
Correct Answer: D. a = 5 or a = -2
Explanation
3a + 10 = a\(^2\)
a\(^2\) - 3a - 10 = 0
a\(^2\) - 5a + 2a - 10 = 0
a(a - 5) + 2(a - 5) = 0
(a - 5)(a + 2) = 0
a = 5 or a = -2.
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 Your email address will not be published.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 *