Quiz: Complete the Square and Quadratic Formula

What do you do to the b value to correctly complete the square?

• square it
• divide it by 2 and square the result
• divide it by 2 and take the square root of the result
• divide it by 2 only

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square
  $x^2-4x+4=20$  
what goes in the blank?
 $x^2-4x\ +_{--}=16+_{--}\$  

• 4

• -4

• 16

• 8

Tags

CCSS.HSA-REI.B.4B

Complete the Square
 $x^2-6x\ +_{--}=5+_{--}$  
What would the next line be?

•  $\left(x+3\right)^2=14$  

•  $\left(x+6\right)^2=39$  

•  $\left(x-3\right)^2=14$  

•  $\left(x-6\right)^{2\ }=39$  

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square:
k² − 12k + 23 = 0

• {6 + √13, 6 - √13}
• {-6 + √13, -6 - √13}
• {6 + √59, 6 - √59}
• {-6 + √59, -6 - √59}

Tags

CCSS.HSA-REI.B.4B

When you solve a quadratic equation you are finding the ____________ of the parabola. Select all that apply

• x-intercepts

• y-intercepts

• zeros

• roots

Select all of the answers to fill in the blanks for the Quadratic Equation
 $x=\frac{\ ??\pm\sqrt{b^2\ ????}}{2a}$  

•  $-b$  

•  $b$  

•  $+4ac$  

•  $-4ac$  

Tags

CCSS.HSA-REI.B.4B

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.A.1

CCSS.HSA.REI.B.4

Solve by the Quadratic Formula
 $2x^2+7x-15=0$  

• -3/2 or 5

• No Solution

• -5 or 3/2

• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

Solve by any appropriate method
 $x^2+8x-20=0$  

•  $\left\{-2,10\right\}$  

•  $\left\{-10,2\right\}$  

•  $\left\{2,10\right\}$  

•  $\left\{-10,-2\right\}$  

Tags

CCSS.HSA-REI.B.4B

What is the shape of a quadratic equation graph?

• a line

• a circle

• a parabola

• none of the above

Tags

CCSS.HSF-IF.C.7A