I think the answer is 3 < x < 8. Make sure to have the underlines underneath the < signs!
Answer:
Step-by-step explanation:
x² + 4x - 1 - x =x² + 4x -x - 1 { bring the like terms together and add}
= x² + 3x - 1
I DON'T UNDERSTAND MATH ANYMORE!!!!!!!!
The equation of any given circle is:

where (h, k) is the center and r is the radius.
In the problem, we are given the center, and the radius. When we plug them in:

we got the formula of the circle.