What is the value of [\frac{(2.3)^2-0.027}{(2.3)^2+0.69+0.09}] ?

Symbiosis National Aptitude Test SNAP 2015 Paper

Question : 22 of 150

Marks: +1, -0

What is the value of

[{(2.3)^2-0.027}/{(2.3)^2+0.69+0.09}]

Solution:

[{(2.3)^2-0.027}/{(2.3)^2+0.69+0.09}]

{(2.3)^3-(0.3)^3}/{(2.3)^2+2.3(0.3)+(0.3)^2}

= 2.3 – 0.3 = 2
[Since

a^3 – b^3

= (a – b)

(a^2 + ab + b^2)

]

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