Quiz #1: Quadratic Formula

In the equation
y = x² +5x +7, match each leading coefficient with its correct letter 

• a=0, b=5, c=7
• a=1, b=5, c=7
• a=7, b=5, c=1

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.

Solve Using the Quadratic Formula 
2x² + 7x - 15 = 0

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

Identify the 'c' value: y = 16x² -8x -24

• 16
• -8
• 24
• -24

Use the graph to determine the solutions.

• -1 and -3
• 1 and -3
• 1 and 3
• -1 and 3

Use the quadratic formula to solve 2x² + 2x - 12?

• -2, 3
• 2, 3
• 2, -3
• -2, -3

 $2m^2=-2m+12$ 
Solve using the quadratic formula.

•  $x=2,-3$ 
  

•  $x=3,-2$ 
  

•  $x=1\pm\sqrt{13}$ 

• No Solution

 $2x^2+3x-20=0$ 

•  $\left\{-1,-2\right\}$ 

•  $\left\{2,1\right\}$ 

•  $\left\{\frac{5}{2},-4\right\}$ 

•  $\left\{2.823,\ 0.177\right\}$