Solving Equations by Quadratic Formula

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form

• Write down: a=1, b=6, c=-13

• Make it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

What methods can be used to solve the equation x² + 10x + 24 = 0?

• Square Root Property

• Factoring

• Completing the Square

• Quadratic Formula

Find the roots of the quadratic equation x² + 10x + 24 = 0.

• x = 24, x = -1

• x = 8, x = 3

• x = -12, x = 2

• x = -4, x = -6

Use the quadratic formula to find the solutions for
3x² + 8x - 1= 0

• 0.1167 and -2.7833

• 0.7 and -16.7

• 0.35 and -8.35

• 0.2358 and -1.236

Use the quadratic formula to find the solutions for
0 = -x² - 5x + 12

• -4.9 and -0.1

• -8.54 and 8.54

• -0.45 and 3.55

• -6.77 and 1.77

The quadratic formula can be used to solve quadratic equations that cannot be factored.

• True

• False

Use the quadratic formula to find the solutions for
2x² - 9x + 5 = 0

• -8.14 and 6.14

• -4.07 and 3.07

• 3.85 and 0.65

• ZERO solutions

What are the solutions of
5x² + 3x = 1?
Use the quadratic formula.  
Round to the nearest hundredth
as needed.

• 1.20, -4.20

• .24, -.84

• -1.20, 4.20

• -.24, .84

What are the solutions of
 x² - 10x + 14 = 0?
Use the quadratic formula.  
Round to the
nearest hundredth as needed.

• 8.32, 1.69

• -1.69, -8.32

• -8.32, 1.69

• -1.69, -8.32

Use quadratic formula to solve the quadratic equation

• A

• B

• C

• D