3.8 Solve by Quadratic Formula Lesson Check

What is this formula?

• This is the speed of light formula.
• This is the quadratic formula.
• This is the zero product property.
• This is scary.

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CCSS.HSA-REI.B.4B

In order to use the quadratic formula you must first...

• Get the equation set equal to 0 and identify a, b, & c

• Move the constant to the right side of the equation

• Factor

• Cry because it is scary

Tags

CCSS.HSA-REI.B.4B

The quadratic equation can be used to solve quadratic equations that cannot be factored.

• True
• False

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

The discriminant is

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac

Tags

CCSS.HSA-REI.B.4B

If the discriminant is positive, how many solutions does the quadratic have?

• 2

• 1

• 0

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CCSS.HSA-REI.B.4B

If the discriminant is negative, how many solutions does the quadratic have?

• 2

• 1

• 0

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CCSS.HSA-REI.B.4B

If the discriminant is zero, how many solutions does the quadratic have?

• 2

• 1

• 0

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CCSS.HSA-REI.B.4B

How many real number solutions does 3k² + k - 1 = 0 have?

• 2

• 1

• 0

Solve using the Quadratic Formula:

x² + 4x = -3

• x = 1 and x = 3

• x = 6 and x = -2

• x = -1 and x = -3

Tags

CCSS.HSA-REI.B.4B