Question

0.87*0.87*0.87+0.13*0.13*0.13/0.87*0.87-0.87*0.13+0.13*0.13

Answer 1

hey,,

hope 0.5645 is the answer

Answer 2

Given, 0.87*0.87*0.87+0.13*0.13*0.13/0.87*0.87-0.87*0.13+0.13*0.13


It is in the form of a^3 + b^3 = (a+b) (a^2 - ab + b^2)


(0.87^3 + 0.13^3 ) / (0.87^2 - 0.87 * 0.13 + 0.13^2) 


=  1 * (0.87^2 - 0.87 * 0.13 + 0.13^2 ) / (0.87^2 - 0.87 * 0.13 + 0.13^2)


= 1


Hope this helps!