### Home > CAAC > Chapter 4 > Lesson 4.1.1 > Problem 4-7

4-7.

Use the eTool below to help you find a rule for the pattern.

Click the link at right for the full version of the eTool: AC 4-7 HW eTool

What is 4^{2}?

What about 8^{2}?

3^{2}?

17 = 4^{2} + 1

65 = 8^{2} + 1

10 = 3^{2} + 1

Can you follow the pattern?