evaluate using suitable identity (993)³
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Answered by
20
(993)³=(1000-7)³=1000000000-343-3.1000.7(993)=979146657
pumin:
how? can you explain?
you have to apply the identity (a-b) ³ where a is 1000 and b is 7
okay thankyou
your welcome
Answered by
38
Answer:
Step-by-step explanation:
(993)^3 = (1000 - 7)^3
= (1000)^3 - (7)^3 - 3(1000)(7)[1000-7]
= 1000000000 - 343 - 21000(993)
= 1000000000 - 343 - 20853000
= 979146657
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