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Coordinate Geometry
Question
Wired Faculty App

Evaluate the following using suitable identities:
(998)3

Answer

(998)3
(998)3 = (1000 - 2)3
= (1000)3 - (2)2 - 3( 1000)(2)( 1000 - 2)
| Using Identity VII
= 1000000000 - 8 - 6000(1000 - 2)
= 1000000000 - 8 - 6000000 + 12000
= 994011992.

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Some More Questions From Coordinate Geometry Chapter

Find the value of n, given (81)5/n = 243.

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.

4x2 - 3x + 7