Answer:

Step-by-step explanation:
y = 18 + 3x²
- 18 - 18
__________

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Answer:
-4
Step-by-step explanation:
5+(-3)-6
2-6
-4
The equation of the circle is written as: (x - h)² + (y - k)² = r²
(h,k) are the points of the center of the circle.
r is the radius.
In case of the given equation the center is (-3,-5)
Hope this helps :)