Factorise: 6x 2 + 7xy - 5y 2
MATHEMATICS
WAEC 1994
Factorise: 6x2 + 7xy - 5y2
- A. (6x + 5y)(x - y)
- B. (2x + 5y)(3x - y)
- C. (3x + y)(2x - 5y)
- D. (3x + 5y)(2x - y)
Correct Answer: D. (3x + 5y)(2x - y)
Explanation
\(6x^2 + 7xy - 5y^2\)
= \(6x^2 + 10xy - 3xy - 5y^2\)
= \(2x(3x + 5y) - y(3x + 5y)\)
= \((2x - y)(3x + 5y)\)
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