Given that x = -\(\frac{1}{2}\) and y = 4 evaluate 3x\(^2y+xy^2\)
A
-5
B
-1
C
4
D
11
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
\(x = -\frac{1}{2}\), y = 4
3x\(^2\)y + xy\(^2\)
3\(\left[-\frac{1}{2}\right]^2 \times 4 + \left(\frac{-1}{2}\right)(4)^2\)
3\(\times \frac{1}{4} \times 4 -\frac{1}{2} \times 16\)
3 - 8 = -5
Source: WAEC / JAMB / NECO Classroom Archive (Record #26450)