Quadratic Formula

For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

• Not Sure

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

• Not Sure

Tags

CCSS.HSA-REI.B.4B

Solve the quadratic equation.
2p² - 2p - 55 = 5

• .  {3.28, -2.28}

• .  {2.5, -1.78}

• . {6, -5}

• {-1, 4}

Tags

CCSS.HSA-REI.B.4B

Solve for x.  Round to the nearest hundredth if necessary.
3x² = 16x + 12

• x = -.67, 6

• x = -6, .67

• x = 3.33, 18

• x = -3.33, 18

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula. f(x) = 2x²- 4x + 7

• (2±2i√10)/2

• (4±√40)/4

• (2±i√10)√/2

• (2±2i√40)/4

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

A coin is being tossed from a 40 foot tall tower of a castle. The coin is tossed upward off of the tower with a velocity of 9 ft/sec. Use the formula h(t) = -16t² + 9t + 40 to calculate how long it will take the coin to hit the ground.

• 1.6059 seconds

• 1.8772 seconds

• -1.3247 seconds

• 1.8872 seconds

Which graph has a discriminant > 0?

• None of them

• Red

• Blue

• Green

What is this formula?

• This is the standard formula.

• This is the quadratic formula.

• This is the square root formula.

• This is the Pythagorean formula

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula

x² + 4x - 40 = -8

(Hint: one side must = 0)

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

Tags

CCSS.HSA-REI.B.4B