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CBSE Class 9 Answered

Using suitable identity evaluate (-28)3 + (9)3 + (19)3
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

x3 + y3 + z3 = 3xyz if x + y + z = 0

Let x = -28

y = 9

z = 19

x + y + z = (-28) + (9) + (19)

= 0

(-28)3 + (9)3 + (19)3 = 3(-28) (9) (19)

= -14364

Answered by | 04 Jun, 2014, 03:23: PM
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