Five Methods for Solving Quadratic Equations

Solve by the Square Root method: x² = 16

• ± 4

• ± 8

• 4

• 8

What is the first step to solving THIS equation by completing the square?

• Set the equation equal to zero

• Divide 10 by 2 and add the result to both sides

• Add a² and 10a together

• Subtract the 21

Solve the equation by completing the square and then finding the roots. 
x²+ 6x - 4 = 36

• x = -7, 7

• x = 4, -10

• x = -4 +- √7

• x = 10, -4

• factoring

• square root

• complete the square

• quadratic formula

• factoring

• square root

• complete the square

• quadratic formula

• factoring

• square root

• complete the square

• quadratic formula

Solve by the Square Root Method:

(x - 2) ² = 49

• 9 or -5

• ± 9

• ± 5

• ± 7

• -4, 2
• -2, 4
• -16
• -4

What is the correct order for solving quadratic equations by completing the square.

What number should be added to both sides of the equation to solve by completing the square?

• -100

• -40

• 40

• 100