Question

evaluate (11)^3 + (14)^3 - (25)^3

please solve it !!

Answer 1

Hey mate..
========

Given,

(11)^3 + (14)^3 - (25)^3........(1)

Now by using the identity in Eq.(1) we get ,

a^3 + b^3 = ( a + b ) ( a^2 - ab + b^2 )

= ( 11 + 14 ) { (11) ^2 - 11×14 + (14)^2 } -(25)^3

= 25 ( 121 - 154 + 196 ) - 15625

= 25 × 163 - 15625

= 4075 - 15625

= -11550


#racks.