What is the domain of y=-3x²+6x-1

this is what i found

Find the domain by finding where the equation is defined. The range is the set of values that correspond with the domain.

Domain:

(-∞,∞),{x|x∈R}

Step-by-step explanation:

x = 31/2 = 15 1/2 = 15.5

Step-by-step explanation:

(x- 4.5)/2=5.5

Multiply both sides by 2.

x−4.5=5.5×2

Multiply 5.5 and 2 to get 11.

x−4.5=11

Add 4.5 to both sides.

x=11+4.5

Add 11 and 4.5 to get 15.5.

x=15.5