Factorize 2x 2 - 21x + 45
MATHEMATICS
WAEC 1993
Factorize 2x2 - 21x + 45
- A. (2x - 9)(x - 5)
- B. (2x-15)(x + 3)
- C. (2x +15)(x - 3)
- D. (2x -15(x - 3)
Correct Answer: D. (2x -15(x - 3)
Explanation
2x\(^2\) - 21x + 45
= 2x\(^2\) - 15x - 6x + 45
= x(2x - 15) - 3(2x - 15)
= (x - 3)(2x - 15)
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 Your email address will not be published.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 *