Five less than twice what negative number squared is 157?

Five less than twice what negative number squared is 157 < - put into an expression

-5 + 2 (-x^2) = 157

Now simplify:

-5 + - 2x^2 = 157

-2x^2 = 162

-2x^2 - 162 = 0

2x^2 + 162 = 0

x^2 + 81 = 0