Solving multi-step problems using quadratic equations in one variable

• 1.5

• -1.5

• -1

• 9

Tags

CCSS.HSA-REI.B.4B

Solve using the Quadratic Formula

6x² - 52 = 11x

• x = 4, -2.17

• x = -4, 2.17

• x = -3.71, -1.88

• x = 3.71, 1.88

Tags

CCSS.HSA-REI.B.4B

Given the equation in standard form

x² -4x - 21 = 0

What is the value of 'c' in the quadratic equation formula?

• 1

• -4

• -21

• 0

Tags

CCSS.HSA-REI.B.4B

• no solution

Tags

CCSS.HSA-REI.B.4B

Solve using Quadratic Formula:

2x² - 3x - 42 = 2

• No real solution

• x = -1.3 or x = -2.7

• x = -0.4 or x = -0.7

• x = 5.5 or x = -4

Tags

CCSS.HSA-REI.B.4B

• 0

• 1

• 2

Tags

CCSS.HSA-REI.B.4B

What would be the best method to solve this quadratic? (You don't have to solve!)

 $3x^2-11x-7=0$  

• Factoring

• Square roots

• Completing the square

• Quadratic formula

Tags

CCSS.HSA-REI.B.4B

What are the solutions of the equation:

 $2x^2+6x-3=0$  

•  $\frac{3\pm\sqrt{15}}{2}$  

•  $\frac{-3\pm\sqrt{15}}{2}$  
  

•  $\frac{-6\pm\sqrt{40}}{2}$  

•  $\frac{6\pm\sqrt{60}}{4}$  

Tags

CCSS.HSA-REI.B.4B

What should you do first in solving this equation using the quadratic formula? 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.

Tags

CCSS.HSA-REI.B.4B

Solve. x² + 4x - 9 = 0

• -2 ± √13
• -2 ± 2√7
• -2 ± √7
• -2 + √7

Tags

CCSS.HSA-REI.B.4B