Question

so, the picture is my question.

Answer 1

A my sister had this before and she was in the same class ur in

Answer 2

Simple...

using the quadratic formula...

$x= \frac{-b+/- \sqrt{ b^{2} }-4ac }{2a}$

-->>

z=-2+/-$\sqrt{7}$

z≈0.64575131,-4.64575131

Thus, your answer.