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Coordinate Geometry
Question
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Without actually calculating the cubes, find the value of each of the following:
 (- 12)3 + (7)3 + (5)3

Answer

(28)3 + (- 15)3 + (- 13)3.
(- 12)3 + (7)3 + (5)3
(- 12)3 + (7)3 + (5)3 = 3(- 12)(7)(5)
| ∵ (- 12) + (7) + (5) = 0
= - 1260

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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