Lesson 3: Square Roots and Cube Roots — Practice Questions

1. 1. Simplify: $\sqrt{9+16} = \_\_\_$.

2. 2. Simplify: $\sqrt{25+144} = \_\_\_$.

3. 3. Simplify: $-\sqrt{1} = \_\_\_$.

4. 4. Simplify: $\sqrt{-49}$.

   • A. 7
   • B. -7
   • C. Not a real number
   • D. 49

5. 5. Simplify: $-\sqrt{100} = \_\_\_$.

6. 6. Simplify: $-\sqrt{4} = \_\_\_$.

7. 7. Simplify: $\sqrt{25}+\sqrt{144} = \_\_\_$.

8. 8. Simplify: $\sqrt{9}+\sqrt{16} = \_\_\_$.

9. 9. Simplify: $-\sqrt{121} = \_\_\_$.

10. 10. Calculate the difference between $9^2$ and $\sqrt{9}$. The difference is ___.