Solving Quadratic Equations Using the Quadratic Formula

If the discriminant is negative, then the quadratic has:

• 1 Rational Solution

• 2 Rational Solutions

• 2 Irrational Solutions

• 2 Complex Solutions

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CCSS.HSA-REI.B.4B

ax²+bx+c=0  is the standard form of a quadratic equation.

• True

• False

When do you use the plus or minus symbol?
±

• After taking the square root of both sides

• After adding the square to both sides

• After taking half of b

• After setting the equation equal to zero

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CCSS.HSA-REI.B.4B

The solutions of a quadratic equation are known as the _____.

• x - Intercepts

• Roots

• Vertices

• Zeros

Given this graph is the function of y=x^2-2x-8 , what is the solution to x^2=2x+8 ?

• (1, 9)
  

• x = {-2, 4}
  

• (0, 8)
  

• x = {5, 2}
  

True or false:
The solutions, roots, x-intercepts, and zeros of a quadratic equation are all the same thing.

• True

• False, because the solution and root are the same but the x-intercept and zero are different

• False, because the x-intercept and root are the same but the zero and solution are different

• False, they are all different

• -7

• 1

• 7

• -1

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CCSS.HSA-REI.B.4B

Find the solutions to the quadratic equation: 2x^2+7x+4=0 Select all that apply.

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CCSS.HSA-REI.B.4B

•  0

•  0.75

•  -0.75

•  4/3

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CCSS.HSA-REI.B.4B

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CCSS.HSA-REI.B.4B