Hello

I am new in this forum

I try to calculate

{-10}^{ 2.6}

using the calculator I get an error

but i write that way

{-10}^{ 2.6} = {-10}^{ 2+ 6/10} = {-10}^{ 2+ 3/5} = {-10}^{2 } * {-10}^{3/5 }

= 100 * {{-10}^{ 3} }^{1/ 5} = 100*{-1000}^{ 1/5} \approx -398.107

i don't know if it's correct

so for {-10}^{ 2.8} i get 630.957344480193

Thanks in advance