Question
Solve:
8(3.75)3 + 1 (7.5)2 - 6.5
Answer: Option D
- Given expression = (2 x 3.75)3 + (1)3 (7.5)2 - (7.5 x 1) + (1)2 = (7.5)3 + (1)3 (7.5)2 - (7.5 x 1) + (1)2 = a3 + b3 a2 - ab + b2 = (a + b) = (7.5 + 1) = 8.5
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- Given expression = (2 x 3.75)3 + (1)3 (7.5)2 - (7.5 x 1) + (1)2 = (7.5)3 + (1)3 (7.5)2 - (7.5 x 1) + (1)2 = a3 + b3 a2 - ab + b2 = (a + b) = (7.5 + 1) = 8.5
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