Simplify frac 3 x frac 15 2y div frac 6 xy - WAEC Mathematics 1991 Question
Simplify \((\frac{3}{x} + \frac{15}{2y}) \div \frac{6}{xy}\)
A
\(\frac{2y - 5x}{4}\)
B
\(\frac{9(2x - 5x)}{x^2y^2}\)
C
\(\frac{5x - 2y}{2}\)
D
\(\frac{c^2y^2}{18y - 45x}\)
correct option: a
\((\frac{3}{x} - \frac{15}{2y}) \div \frac{6}{xy}\)
= \((\frac{6y - 15x}{2xy}) \div \frac{6}{xy}\)
= \(\frac{6y - 15x}{2xy} \times \frac{xy}{6}\)
= \(\frac{3(2y - 5x)}{2xy} \times \frac{xy}{6}\)
= \(\frac{2y - 5x}{4}\)
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