Quadratic Equations by Formula

Solve the following quadratic equation using Quadratic Formula

2x² - 3x - 5 = 0

• x = -1

  x = 5/2

• x = 5

  x = 2

• x = -1/2

  x = 5

• x = 1/2

  x = -5/2

• No solution

Solve using the Quadratic Formula:

2x² + 2x − 12 = 0

• x = −2, 3

• x = 2, 3

• x = 2, −3

• x = −2, −3

Determine the values of

a, b, and c:

4x² – 8x – 3 = 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

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

• True

• False

Fill in quadratic formula

j

h

d

2a

b

a^2

b^2

4ac-b^2

b^2-4ac

-b^2-4ac

-2a

-b

b^2+4ac

j

h

d

b^2

-b^2-4ac

a^2

b²-4ac

b

b^2+4ac

4ac-b^2

-b

-2a

2a

Tags

CCSS.MATH.CONTENT.HSN.CN.C.7

CCSS.MATH.CONTENT.HSA.SSE.A.1.b

Fill in the formula x^2-6x-40=0 ​ BLUE=​ (a)   RED= ​ (b)   GREEN= ​ (c)  

• -6

• 1

• -40

• -1

• 6

• 40

Solve for x.  Round to the nearest hundredth if necessary.
4x² + 4x = 3

• x = .5, -1.5

• x = -.5, -1.5

• x = .5, -1.67

• x = -.5, 1.67

Solve for x. How can you solve for it on the calculator?

Solve for x.  Round to the nearest hundredth if necessary.
x² + 11x + 5 = -5

• x = -1, -10

• x = 1, 10

• x = 0, 11

• x = 0, -11