MHB What is the axis of symmetry of quadratic function f(x)=-2x^2-(1/2)

[Lucas7105]

The problem is:
f(x)=-2x^2-(1/2)
Determine if this statement is true of false:
The axis of symmetry is x=-2.
What is the axis of symmetry? How can you figure out the axis of symmetry without a b value, since the formula for it is x=-b/2a

 

[MarkFL]

Hello, and welcome to MHB! (Wave)

What if you write the given function in the equivalent form:

$$f(x)=-2x^2+0x-\frac{1}{2}$$

 

[PeterOwen]

Can someone tell me how to even remember all this? I watch at this and don't understand.