Solving Quadratics Review

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5

Tags

CCSS.HSA-REI.B.4B

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6
• x = 3 and x = -6
• x = -9 and x = 2
• x = 9 and x = -2

Tags

CCSS.HSA-REI.B.4B

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

 $\left(x+3\right)^2=24\ \ \ Solve\ by\ Square\ Roots$  

•  $x=3\pm3\sqrt{4}$  

•  $x=-3\pm4\sqrt{3}$  

•  $x=-3\pm7$  

•  $x=3\pm2\sqrt{6}$  

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

 $4x^2+8x-1=0$  Use the Quadratic Formula to Solve.

•  $\frac{-8\pm2\sqrt{5}}{8}$  

•  $\frac{-8\pm\sqrt{80}}{8}$  

•  $-1\ and\ \frac{1}{2}$  

•  $\frac{-8\pm4\sqrt{5}}{8}$  

What do you ADD to both sides to Complete the square?

x² + 6x + ____ = 8 + ____

• 18

• 6

• 36

• 9

Solve the following equation by completing the square:
n² - 2n - 3 = 0

• {3 and-1}
• {4 and -4}
• {5 and -3}
• {8 and -7}

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square.

x² +12x = 5

• $6\pm\sqrt{41}$

• $35\ or\ 47$

• $-6\pm\sqrt{41}$

• $\sqrt{35}\ or\ \sqrt{47}$