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प्रश्न
If a - 2b + 3c = 0; state the value of a3 - 8b3 + 27c3.
योग
उत्तर
a3 - 8b3 + 27c3 = a3 + (-2b)3 + (3c)3
Since a - 2b + 3c = 0, we have
a3 - 8b3 + 27c3 = a3 + (-2b)3 + (3c)3
= 3(a)( -2b)(3c)
= -18abc
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