The Quadratic Formula, Imaginary Numbers and Discriminant

Find the discriminant of the equation 9x² + 6x + 12 = 0.

• 396

• -396

• 0

• -144

Tags

CCSS.HSA-REI.B.4B

For what value of the discriminant will make the nature of the roots of a quadratic equation Imaginary?

• Zero

• Perfect Square

• Not Perfect Square

• Negative

Tags

CCSS.HSA-REI.B.4B

Find the value of x in the quadratic equation x² – 144 = 0.

• 12

• -12

• 16

• -16

Tags

CCSS.8.EE.A.2

Which coefficients of a quadratic equation is used to determine the sum of its roots?

• a and b

• b and c

• a and c

• a, b and c

Tags

CCSS.HSA-REI.B.4B

Given the quadratic equation x² – 8x + 7, what is the sum of its roots?

Hint: (-b/a)

• 8

• -8

• 7

• -7

Tags

CCSS.HSA-REI.B.4B

If the discriminant is negative, then the quadratic has:

• Real Solution

• Real Solutions

• Half a Solution

• Imaginary Solutions

Tags

CCSS.HSA-REI.B.4B

Solve by ANY method you have learned: x²−2x+11=0

• 1±i√10

• 1±√10

• -1±i√10

• -1±√10

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Which method is most efficient for solving:

x²+7x+14=0

• Square root method

• Quadratic Formula

• Factoring

• Completing the Square

Tags

CCSS.HSA-REI.B.4B

If the discriminant equals 0, then the quadratic has:

• Real Solution

• Real Solutions

• Half a Solution

• Imaginary Solutions

Tags

CCSS.HSA-REI.B.4B

If the discriminant is positive, then the quadratic has:

• Real Solution

• Real Solutions

• Half a Solution

• Imaginary Solution

Tags

CCSS.HSA-REI.B.4B