Given that x - frac 1 2 and hspace 1mm y 4 hspa... - WAEC Mathematics 2000 Question
Given that \(x = -\frac{1}{2}and \hspace{1mm} y = 4 \hspace{1mm} evaluate \hspace{1mm} 3x^2y+xy^2\)
A
-5
B
-1
C
4
D
11
correct option: a
\(x = -\frac{1}{2}, y = 4\
3x^2y + xy^2\
3\left[-\frac{1}{2}\right]^2 \times 4 \times + \left(\frac{-1}{2}\right)(4)^2\
3\times \frac{1}{4} \times 4 -\frac{1}{2} \times 16\
3-8 = -5\)
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