# Graph x^2+y^2+18x-4y+76=0

Graph x^2+y^2+18x-4y+76=0
Subtract from both sides of the equation.
Complete the square for .
Use the form , to find the values of , , and .
Consider the vertex form of a parabola.
Substitute the values of and into the formula .
Cancel the common factor of and .
Factor out of .
Cancel the common factors.
Factor out of .
Cancel the common factor.
Rewrite the expression.
Divide by .
Find the value of using the formula .
Simplify each term.
Raise to the power of .
Multiply by .
Divide by .
Multiply by .
Subtract from .
Substitute the values of , , and into the vertex form .
Substitute for in the equation .
Move to the right side of the equation by adding to both sides.
Complete the square for .
Use the form , to find the values of , , and .
Consider the vertex form of a parabola.
Substitute the values of and into the formula .
Simplify the right side.
Cancel the common factor of and .
Factor out of .
Cancel the common factors.
Factor out of .
Cancel the common factor.
Rewrite the expression.
Divide by .
Multiply by .
Find the value of using the formula .
Simplify each term.
Cancel the common factor of and .
Rewrite as .
Apply the product rule to .
Raise to the power of .
Multiply by .
Factor out of .
Cancel the common factors.
Cancel the common factor.
Rewrite the expression.
Divide by .
Multiply by .
Subtract from .
Substitute the values of , , and into the vertex form .
Substitute for in the equation .
Move to the right side of the equation by adding to both sides.
Simplify .
This is the form of a circle. Use this form to determine the center and radius of the circle.
Match the values in this circle to those of the standard form. The variable represents the radius of the circle, represents the x-offset from the origin, and represents the y-offset from origin.
The center of the circle is found at .
Center:
These values represent the important values for graphing and analyzing a circle.
Center:
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### Name

Name eight hundred million sixty-nine thousand three hundred sixty-nine

### Interesting facts

• 800069369 has 4 divisors, whose sum is 872802960
• The reverse of 800069369 is 963960008
• Previous prime number is 11

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 41
• Digital Root 5

### Name

Name seven hundred fifty-four million three hundred fifty thousand two hundred thirty-one

### Interesting facts

• 754350231 has 16 divisors, whose sum is 1077801984
• The reverse of 754350231 is 132053457
• Previous prime number is 83

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 30
• Digital Root 3

### Name

Name one billion three million six hundred twenty thousand two hundred three

### Interesting facts

• 1003620203 has 16 divisors, whose sum is 1057335552
• The reverse of 1003620203 is 3020263001
• Previous prime number is 491

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 17
• Digital Root 8