Quadratic Formula

X intercepts are also called....

Choose all that apply

• Solutions

• Parabolas

• Roots

• Zeros

Given a graph, how can you find the "solutions" to a quadratic?

• Copy off neighbor

• Plug into calculator

• Look to see where the parabola crosses the x-axis on the graph

• Guess

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x+0 = 3
*remember right side should =0

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

Identify a, b, and c in: x²−6x+14=0

• a=3,b=5,c=9

• a=1,b=-6,c=14

• a=1,b=-6,c=-14

• a=1,b=6,c=14

To identify the coefficients (a, b, and c) to use the quadratic formula, what form must the equation be in?

Solve using the quadratic formula:

4x² + 4x + 1 = 0

Hint: There is only ONE solution

• x = -½

• x = -2

• x = 0

• x = ½

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

• No Real Solution