The answer is 4z squared - 3z - 4
Answer:
or
Step-by-step explanation:
The given quadratic equation is

Group the constant terms on the right hand side.


Divide through by 5.

Add the square of half the coefficient of x., which is
to both sides of the equation.

The left hand side is now a perfect square.

Take the square root of both sides;



or 
or 
or 
Coal cause when you burn it it is gone hope I helped
Answer:
9 1/6
You may use a fraction calulator for this question by the way!
Hope this helps!
Sorry if its wrong!
Have a nice day!