Solving Quadratics

Solve
2x² + 17x + 21 = 0

• x= ^-21/₂, -17
• x= ²/₃, 16
• x=-7, ^-3/₂
• x=15, -³/₇

Tags

CCSS.HSA-REI.B.4B

Solve in simplest radical form:

-2(k- 1)² - 6 = -54

• No real solutions

• k =

  $3\sqrt{6}\ and\ -3\sqrt{6}$

• k = $1\pm\sqrt{24}$

• k = $1\pm2\sqrt{6}$

Tags

CCSS.8.EE.A.2

Solve by factoring:

a² + 2a - 24 = 0

• a = -6, 4

• a = 6, -4

• a = 12, -2

• a = 8, -3

Tags

CCSS.HSA-REI.B.4B

Which quadratic has the same solution set as : (x + 1) ² = 25

• x² + 2x = 24

• x² = 24

• 2x² - 4x - 48 = 0

• x² =16

Tags

CCSS.HSA-REI.B.4B

Solve 14 - x² = 17

• x = ±1.73

• x = 3

• no real solutions

• x = -3

Tags

CCSS.8.EE.A.2

Solve    
2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

Solve for x.  Round to the nearest hundredth if necessary.
3x² = 16x + 12

• x = -.67, 6
• x = -6, .67
• x = 3.33, 18
• x = -3.33, 18

Tags

CCSS.HSA-REI.B.4B

A rocket is shot out of a 8ft tall pipe following the model:

h = -16t² + 50t + 8. It will hit the ground in approximately 3.28 seconds.

• True

• False

What is the correct simplification of   $2\pm\sqrt{\frac{50}{4}}$  

•  $2\pm\sqrt{12.5}$  

•  $2\pm2.5$  

•  $2\ \pm5$  

•  $2\pm2.5\sqrt{2}$  

Tags

CCSS.HSA-REI.B.4B

What is the value of the discriminant in the following quadratic: 3 - x(x - 2) = 16 +5x

• -61

• 3

• -43

• about 6.6

Tags

CCSS.HSA-REI.B.4B