Solve for z by using the quadratic formula: z^2 - 4z = 0.
A. 0, -4
B. 0, 4
C. 1, 4
D. 1, -4

Question

Solve for z by using the quadratic formula: z^2 - 4z = 0. 
	A.	0, -4
	B.	0, 4
	C.	1, 4
	D.	1, -4

.sam. · Answer

z^(2)-4z=0

z(z-4)=0

z=0

z-4=0

z=4

z=0,4

hero · Answer

Yeah, exactly....forget the quad formula.

hero · Answer

It's clear that people would rather use methods other than the quad formula if necessary.

directrix · Answer

I was wondering if the work had to be shown with the answer. If that is the case, then the instructions "Solve for z by using the quadratic formula" would not have been followed. If only the answer has to be punched in somewhere, certainly factoring would be the efficient route.

hero · Answer

Using quad form should only be a last resort. When other methods have failed.