JAMB - Mathematics (1987 - No. 24)
Simplify \(\frac{x^2 - y^2}{2x^2 + xy - y^2}\)
\(\frac{x + y}{2x + y}\)
\(\frac{x + y}{2x - y}\)
\(\frac{x - y}{2x - y}\)
\(\frac{x - y}{2x + y}\)
ব্যাখ্যা
\(\frac{x^{2} - y^{2}}{2x^{2} + xy - y^{2}}\)
\(2x^{2} + xy - y^{2} = 2x^{2} - xy + 2xy - y^{2}\)
= \(x(2x - y) + y(2x - y) \)
= \((x + y)(2x - y)\)
\(\frac{x^{2} - y^{2}}{2x^{2} + xy - y^{2}} = \frac{(x + y)(x - y)}{(x + y)(2x - y)}\)
= \(\frac{x - y}{2x - y}\)