Solving Quadratic Equations by Square Roots and Quadratic Formula

Choose the best method to solve this quadratic:

​ (a)  

3x² - 21 = 3

• Square Roots

• ZPP

• Quadratic Formula

Choose the best method to solve this quadratic:

​ (a)  

-3 = 4x² + 9x

• Quadratic Formula

• Square Roots

• ZPP

Choose the best method to solve this quadratic:

​​ (a)  

x² + 8x - 13 = 0

• Square Roots

• ZPP

• Quadratic Formula

Choose the best method to solve this quadratic:

​ (a)  

2(x + 2)² - 5 = 8

• Square Roots

• Quadratic Formula

• ZPP

Which of the following are steps to solve a quadratic equation by square roots. (check all that apply)

• Identify a, b, and c

• get the squared value by itself

• cancel the square by taking the square root of each side

• remember to include the positive and negative root

• set the equation equal to zero

Solve by square roots (SADMEP)
x² - 64 = 0

• 64

• 8

• 8 or -8

• 1 or -64

• A
• B
• C
• D

Solve using square roots.

• A

• B

• C

• D

Solve for x

3x² - 27 = 0

• x = 4.9, -4.9

• x = 9, -9

• x = 3, -3

• No solution

• -45 and 45
• -5 and 5
• -225 and 225
• -15 and 15