### Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-19

9-19.

Samantha thinks that the equation (*x* − 4)^{2} + (*y* − 3)^{2} = 25 is equivalent to the equation (*x* − 4) + (*y* − 3) = 5. Is she correct? Are the two equations equivalent? Explain how you know. If they are not equivalent, explain Samantha's mistake. Homework Help ✎

Try substituting (0, 0) into both equations.