CMAT 2015 Solved Question Paper

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Question : 4 of 100

Marks: +1, -0

Find the value of the following expression.

(1.348)^3

+ 3(1.348)(1.304) +

(0.652)^3

2.258
8.258
2
8

Solution:

(d)

(1.348)^3

+ 3(1.348)(1.304) +

(0.652)^3

=

(1.348)^3

+ 3(1.348)(0.652)(1.348 + 0.652) +

(0.652)^3

=

(1.348 + 0.652)^3

\;\;\;\;\;\;

[∵(a + b)^3 = a^3

+ 3ab(a+b) +

b^3]

=

(2)^3

= 8

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