Question

simplify 0.81 whole cube minus 0.2 whole cube by 0.81 whole square + 0.162 + 0.2 whole square​

Answer 1

0.79 is the Answer

as (0.81)^3-(0.2)^3 =(0.81-0.2)((0.81)^2+0.81*0.2+(0.2)^2)

Divide out (0.81)^2+0.162+(0.2)^2

you get 0.81-0.2=0.79