solve with identity 12^3-7^3-5^3
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outflux
08.06.2019
Math
Secondary School
+5 pts
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Evaluate (12)^3 + (-7)^3 + (-5)^3 using suitable identity
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given :- (12)³ + (-7)³ + (-5)³
using identity a³ + b³ + c³ = 3abc
here,
a = 12
b = -7
c = -5
therefore (12)³ + (-7)³ + (-5)³ = 3(12)(-7)(-5)
= 3(420)
= 1260
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