SSC CGL 9 Aug 2017 Shift 1 Paper

Question : 62 of 100

Marks: +1, -0

If (x -y )= 7 , then what is the value of

(x - 15)^3 - (y - 8)^3

Solution:

x - y = 7
⇒ x = y + 7
∴

(x - 15)^3 - (y - 8)^3

(y + 7 - 15)^3 - (y - 8)^3

= (y - 8)^3 - (y - 8)^3 = 0

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