What is an estimate for the square root of 150? (do not find the exact value.)

Using a calculator, estimate the square root of 8 to the nearest thousandth.

The square root of 8 is approximately

Find all distinct roots (real or complex) of z2+(−2−3i)z+(−1+3i). Enter the roots as a comma-separated list of values of the form a+bi. Use the square root symbol '√' where needed to give an exact value for your answer.