1. What are the solutions of the equation x2 – 9 = 0? Use a graph of the related function.

2. What are the solutions of the equation 2x2 = 8? Use a graph of the related function.

3. For questions 3–4, solve the equation using square roots.
x2 – 81 = 0

4. 3x2 – 147 = 0

5. The area of a playground is 20 square yards. The length of the playground is 5 times longer than its width. Find the length and width of the playground.

Question

1.   What are the solutions of the equation x2 – 9 = 0? Use a graph of the related function. 

2.   What are the solutions of the equation 2x2 = 8? Use a graph of the related function. 

3.   For questions 3–4, solve the equation using square roots.
x2 – 81 = 0  

4.   3x2 – 147 = 0

5.   The area of a playground is 20 square yards. The length of the playground is 5 times longer than its width. Find the length and width of the playground.