This is a quadratic equation. There's a shortcut (two shortcuts really) called the Shakespeare Quadratic Formula (2b or -2b) applicable when the middle term is even:
OK, our problem is
Typically we'd write 
but the answers here don't so we won't either.
Answer: C and D
Answer:
The domain is the input values on the x-axis and range is input values on the y-axis
Step-by-step explanation:
Basically, domain is the horizontal values and range is the vertical ones.
