Pre-Algebra Examples

$- 6 x = - x^{2} + 32 y - 264 - y^{2}$

Step 1

Since $y$ is on the right side of the equation, switch the sides so it is on the left side of the equation.

$- x^{2} + 32 y - 264 - y^{2} = - 6 x$

Step 2

Move all terms containing variables to the left side of the equation.

Tap for more steps...

Step 2.1

Add $6 x$ to both sides of the equation.

$- x^{2} + 32 y - 264 - y^{2} + 6 x = 0$

Step 2.2

Move $- 264$ .

$- x^{2} + 32 y - y^{2} + 6 x - 264 = 0$

Step 2.3

Move $32 y$ .

$- x^{2} - y^{2} + 6 x + 32 y - 264 = 0$

Step 3

Add $264$ to both sides of the equation.

$- x^{2} - y^{2} + 6 x + 32 y = 264$

Step 4

Divide both sides of the equation by $- 1$ .

$x^{2} + y^{2} - 6 x - 32 y = - 264$

Step 5

Complete the square for $x^{2} - 6 x$ .

Tap for more steps...

Step 5.1

Use the form $a x^{2} + b x + c$ , to find the values of $a$ , $b$ , and $c$ .

$a = 1$

$b = - 6$

$c = 0$

Step 5.2

Consider the vertex form of a parabola.

$a {(x + d)}^{2} + e$

Step 5.3

Find the value of $d$ using the formula $d = \frac{b}{2 a}$ .

Tap for more steps...

Step 5.3.1

Substitute the values of $a$ and $b$ into the formula $d = \frac{b}{2 a}$ .

$d = \frac{- 6}{2 \cdot 1}$

Step 5.3.2

Cancel the common factor of $- 6$ and $2$ .

Tap for more steps...

Step 5.3.2.1

Factor $2$ out of $- 6$ .

$d = \frac{2 \cdot - 3}{2 \cdot 1}$

Step 5.3.2.2

Cancel the common factors.

Tap for more steps...

Step 5.3.2.2.1

Factor $2$ out of $2 \cdot 1$ .

$d = \frac{2 \cdot - 3}{2 (1)}$

Step 5.3.2.2.2

Cancel the common factor.

$d = \frac{2 \cdot - 3}{2 \cdot 1}$

Step 5.3.2.2.3

Rewrite the expression.

$d = \frac{- 3}{1}$

Step 5.3.2.2.4

Divide $- 3$ by $1$ .

$d = - 3$

Step 5.4

Find the value of $e$ using the formula $e = c - \frac{b^{2}}{4 a}$ .

Tap for more steps...

Step 5.4.1

Substitute the values of $c$ , $b$ and $a$ into the formula $e = c - \frac{b^{2}}{4 a}$ .

$e = 0 - \frac{{(- 6)}^{2}}{4 \cdot 1}$

Step 5.4.2

Simplify the right side.

Tap for more steps...

Step 5.4.2.1

Simplify each term.

Tap for more steps...

Step 5.4.2.1.1

Raise $- 6$ to the power of $2$ .

$e = 0 - \frac{36}{4 \cdot 1}$

Step 5.4.2.1.2

Multiply $4$ by $1$ .

$e = 0 - \frac{36}{4}$

Step 5.4.2.1.3

Divide $36$ by $4$ .

$e = 0 - 1 \cdot 9$

Step 5.4.2.1.4

Multiply $- 1$ by $9$ .

$e = 0 - 9$

Step 5.4.2.2

Subtract $9$ from $0$ .

$e = - 9$

Step 5.5

Substitute the values of $a$ , $d$ , and $e$ into the vertex form ${(x - 3)}^{2} - 9$ .

${(x - 3)}^{2} - 9$

Step 6

Substitute ${(x - 3)}^{2} - 9$ for $x^{2} - 6 x$ in the equation $x^{2} + y^{2} - 6 x - 32 y = - 264$ .

${(x - 3)}^{2} - 9 + y^{2} - 32 y = - 264$

Step 7

Move $- 9$ to the right side of the equation by adding $9$ to both sides.

${(x - 3)}^{2} + y^{2} - 32 y = - 264 + 9$

Step 8

Complete the square for $y^{2} - 32 y$ .

Tap for more steps...

Step 8.1

Use the form $a x^{2} + b x + c$ , to find the values of $a$ , $b$ , and $c$ .

$a = 1$

$b = - 32$

$c = 0$

Step 8.2

Consider the vertex form of a parabola.

$a {(x + d)}^{2} + e$

Step 8.3

Find the value of $d$ using the formula $d = \frac{b}{2 a}$ .

Tap for more steps...

Step 8.3.1

Substitute the values of $a$ and $b$ into the formula $d = \frac{b}{2 a}$ .

$d = \frac{- 32}{2 \cdot 1}$

Step 8.3.2

Cancel the common factor of $- 32$ and $2$ .

Tap for more steps...

Step 8.3.2.1

Factor $2$ out of $- 32$ .

$d = \frac{2 \cdot - 16}{2 \cdot 1}$

Step 8.3.2.2

Cancel the common factors.

Tap for more steps...

Step 8.3.2.2.1

Factor $2$ out of $2 \cdot 1$ .

$d = \frac{2 \cdot - 16}{2 (1)}$

Step 8.3.2.2.2

Cancel the common factor.

$d = \frac{2 \cdot - 16}{2 \cdot 1}$

Step 8.3.2.2.3

Rewrite the expression.

$d = \frac{- 16}{1}$

Step 8.3.2.2.4

Divide $- 16$ by $1$ .

$d = - 16$

Step 8.4

Find the value of $e$ using the formula $e = c - \frac{b^{2}}{4 a}$ .

Tap for more steps...

Step 8.4.1

Substitute the values of $c$ , $b$ and $a$ into the formula $e = c - \frac{b^{2}}{4 a}$ .

$e = 0 - \frac{{(- 32)}^{2}}{4 \cdot 1}$

Step 8.4.2

Simplify the right side.

Tap for more steps...

Step 8.4.2.1

Simplify each term.

Tap for more steps...

Step 8.4.2.1.1

Raise $- 32$ to the power of $2$ .

$e = 0 - \frac{1024}{4 \cdot 1}$

Step 8.4.2.1.2

Multiply $4$ by $1$ .

$e = 0 - \frac{1024}{4}$

Step 8.4.2.1.3

Divide $1024$ by $4$ .

$e = 0 - 1 \cdot 256$

Step 8.4.2.1.4

Multiply $- 1$ by $256$ .

$e = 0 - 256$

Step 8.4.2.2

Subtract $256$ from $0$ .

$e = - 256$

Step 8.5

Substitute the values of $a$ , $d$ , and $e$ into the vertex form ${(y - 16)}^{2} - 256$ .

${(y - 16)}^{2} - 256$

Step 9

Substitute ${(y - 16)}^{2} - 256$ for $y^{2} - 32 y$ in the equation $x^{2} + y^{2} - 6 x - 32 y = - 264$ .

${(x - 3)}^{2} + {(y - 16)}^{2} - 256 = - 264 + 9$

Step 10

Move $- 256$ to the right side of the equation by adding $256$ to both sides.

${(x - 3)}^{2} + {(y - 16)}^{2} = - 264 + 9 + 256$

Step 11

Simplify $- 264 + 9 + 256$ .

Tap for more steps...

Step 11.1

Add $- 264$ and $9$ .

${(x - 3)}^{2} + {(y - 16)}^{2} = - 255 + 256$

Step 11.2

Add $- 255$ and $256$ .

${(x - 3)}^{2} + {(y - 16)}^{2} = 1$

Step 12

This is the form of a circle. Use this form to determine the center and radius of the circle.

${(x - h)}^{2} + {(y - k)}^{2} = r^{2}$

Step 13

Match the values in this circle to those of the standard form. The variable $r$ represents the radius of the circle, $h$ represents the x-offset from the origin, and $k$ represents the y-offset from origin.

$r = 1$

$h = 3$

$k = 16$

Step 14

The center of the circle is found at $(h, k)$ .

Center: $(3, 16)$

Step 15

These values represent the important values for graphing and analyzing a circle.

Center: $(3, 16)$

Radius: $1$

Step 16