Ta có ;
\(0.008-a^3b^6\)
\(=\left(0.2\right)^3-\left(ab^2\right)^3\)
\(=\left(0.2-ab^2\right)\left(0.04+0.2ab^2+a^2b^4\right)\)
\(0,008=0,2^3,a^6b^3=\left(a^2b\right)^3\)
=> \(0,2^3-\left(a^2b\right)^3=\left(0,2-a^2b\right)\left(0,04+0,2ab+a^4b^2\right)\)