Question 277516
1. Find all square roots of the number. 256.
2. Use a calculator to approximate the square root. Round to three decimal places. -√0.00421.

1. x^2 = 256
   x = +- 16

2. x^2 = -sqrt(0.00421) (hoping this is what you asking for here)
   x^2 = -1 * sqrt(0.00421)
   x = +- 0.255i