Question

I need help with numbers 2 and 4. (Algebra 2) (Imaginary Numbers)
Number 2 is 'Simplify The Square Root' and number 4 is a 'Solve The Quadratic Equation By Taking Square Roots', both have examples of how to solve them above the problems, but I can't seem to figure it out. | The second pictures are the answers I got. (I have gotten a few different ones for #4)

Answer 1

Answer:

(2). $\frac{i\sqrt{5} }{3}$ ; (4) ± $4i\sqrt{3}$ .

Step-by-step explanation: