Find the value of a3 -27b3 if a - 3b =( -6) and ab = (-10)
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Answered by
28
Answer:
324
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Answered by
8
a3-27b3=(a) 3-(3b) 3
also, a3-(3b) 3=(a-3b)3+9ab(a-3b)
there fore,
a3-(3b) 3=(-6)3+(-90)(-6)
=-216+540
=324
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