Quadratic Formula

QUESTION 5

• A

• B 

• C 

• D 

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

• 16

• -8

• 8

• -24

Solve using the quadratic formula.

2x² - 9x - 35 = 0

• x = 7/2 and x = -6

• x = -5/2 and x =5

• x = -3/7 and x =6

• x = -5/2 and x = 7

What does the discriminant tell us?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

2x²-x -3=0

• x=-3/2  x=1

• x= 3/2 x= -1

• x= -3/2 x= -1

• x= 3/2 x= 1

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

• True

• False

Solve by using the quadratic formula.

7x² - 26x - 8 = 0

• x = -1 and x = -7/8

• x = 4 and x = -2/7

• x = -4 and x = 2/7

• x = 4 and x = -7/2

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

• -2, 3

• 2, 3

• 2, -3

• -2, -3

Solve for x. Round to the nearest hundredth if necessary.

3x² = 16x + 12

• x = -0.67 and x = 6

• x = -6 and x = 0.67

• x = 3.33 and x = 18

• x = -3.33 and x = 18