(-5 - square root of -3) squared=
Well i assume we have
\(-5-( \sqrt{3} )^2\)
A square root when written out is 1/2 so the 2 goes on the outside and the one goes inside the square root. So now we have (square root -3)^2
The ^2 will get cancelled with the 2 of the square root. Then we will have
-5 + -3 = -2