Evaluate without actual calculation -
a) (2.2)^3-(1.2)^3-1^3
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Answer) 7.92
If a + b + c = 0, then the formula will be: a^3 + b^3 + c^3 = 3abc
Let a = 2.2, b = -1.2 and c = -1
a + b + c = 2.2 + (-1.2) + (-1)
=> 2.2 - 2.2 = 0
By using the formula,
a^3 + b^3 + c^3 = 3abc
=> 3 x 2.2 x (-1.2) x (-1)
=> 7.92
Therefore, your answer is 7.92
Answer) 7.92
If a + b + c = 0, then the formula will be: a^3 + b^3 + c^3 = 3abc
Let a = 2.2, b = -1.2 and c = -1
a + b + c = 2.2 + (-1.2) + (-1)
=> 2.2 - 2.2 = 0
By using the formula,
a^3 + b^3 + c^3 = 3abc
=> 3 x 2.2 x (-1.2) x (-1)
=> 7.92
Therefore, your answer is 7.92
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