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Coordinate Geometry

Question
CBSEENMA9001877
Wired Faculty App

Without actually calculating the cubes, find the value of each of the following:
(28)3 + (- 15)3 + (- 13)3

Solution

(28)3 + (- 15)3 + (- 13)3
(28)3 + (- 15)3 + (- 13)3
= 3(28)(- 15)(- 13)
| ∵ (28) + (- 15) + (- 13) = 0
= 16380.

Some More Questions From Coordinate Geometry Chapter

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

4x2 - 3x + 7

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

x10+ y3 + t50

Write the coefficients of x2 in each of the following:

2 + x2 + x

Write the coefficients of x2 in each of the following:
2 - x2 + x3

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