7.
Find the value of the expression:
987 987 987-357 ~ 357 ~ 357
987 x 987 +987 ~ 357 +357 x 357
(A) 530
(B) 735
(C) 630
(D) 525
(E) None of these
Answers
Answered by
1
Answer:
Explanation:
ans 7
Answered by
5
Answer:
Explanation:987×987×987-357×357×357/987×987+987+357×357
Which can be written as_
(987^3)-(987^3)/ (987^2)+987×357+(357^2)
Using a^3-b^3=(a-b)×(a^2+ab+b^2)
(987-357)×((987)^2+987×357+(357)^2))/(987^2)+987×357+(357^2)
=987-357 [ cancelling Nr and Dr ]
=630
Answer-c
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