x2 + 6x + y2 - 7 = 0
x2 + 6x + y2 = 7
x2 + 6x + 32 + y2 = 7 + 32
(x + 3)2 + y2 = 16
Standard Equation form:
The center is (-3, 0) and r = 4
Then count 4 units along the x and y direction.
Draw a beautiful circle.
Graph the equation: x2 + 6x + y2 - 7 = 0
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x2 + 6x + y2 - 7 = 0 |
Put in the Standard Equation form |
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x2 + 6x + y2 = 7 |
Add 7 to both sides |
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x2 + 6x + 32 + y2 = 7 + 32 |
Take half the middle term and square it. |
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(x + 3)2 + y2 = 16 |
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Standard Equation form: |
(x - h)2 + (y - k)2 = r2 |
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The center is (-3, 0) and r = 4 |
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Locate
the center (-3,0)
Then count 4 units along the x and y direction. Draw a beautiful circle. |