Solve Quadratic by Square Root Method

Which method is MOST EFFICIENT to solve:
8x²  -  6  = 0

• Square Root Method

• Factoring

• Complete the Square

• Quadratic Formula

Can this quadratic be solved by BOTH square root method AND difference of squares?
2x² - 7 = 0

• Yes!

• No - just square root method

• No - just difference of squares method

Can this quadratic be solved by BOTH square root method AND factoring?

16x² - 25 = 0

• Yes!

• No - just square root method

• No - just factoring

Solve by the Square Root method: x² = 16

• ± 4

• ± 8

• 4

• 8

Solve by using the square root method:

• No Solution

• x = 3, -3

• x = -21, 21

• x = 7, -7

x² = 16

• ± 4

• ± 8

• 4

• 8

Solve using the square root method:

x² - 49 = 0

• x = -7, x = 7

• x = -7

• x = 7

• x = -7, x = 1

Solve using square root method

3x² = 12

• ± 2

• 2

• ± √12

• ± 4

• 4

Decide on the best method:
x² - 18 = 0

• Square Root Method

• Factor Method 

• Complete the Square

• Quadratic Formula

• -3

• 3

• 4

• 1

• 2

• -2

• 8

• 0

• 5

• 11