If a 2 b -2 and c - frac 1 2 evaluate ab2 - bc2... - JAMB Mathematics 1990 Question
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 Option: D
(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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