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If a = 2, b = -2 and c = -\(\frac{1}{2}\), evaluate (ab2 - bc2)(a2c...

Mathematics
JAMB 1990

If a = 2, b = -2 and c = -\(\frac{1}{2}\), evaluate (ab2 - bc2)(a2c - abc)
  • A. 2
  • B. -28
  • C. -30
  • D. -34
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Correct Answer: Option D
Explanation
(ab2 - bc2)(a2c - abc)

[2(2)2 - (- 2x\(\frac{1}{2}\))] [22(-\(\frac{1}{2}\)) - 2(-2)(-\(\frac{1}{2}\))]

[8 = \(\frac{1}{2}\)][-2 - 2] = \(\frac{17}{2}\) x 42

= -34

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