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Home > A2C > Chapter 6 > Lesson 6.2.3 > Problem 6-87

6-87.

A circle has the equation . If the circle is shifted units to the left, units up, and the radius is doubled, what will its new equation be? Homework Help ✎

The general equation for a circle is
where the center is at and the radius has length .

Be sure to square the doubled radius correctly: