Math 2 - Practice 14.7-14.8

Solve by completing the square:

x²+4x-77=0

• 2±i√73

• 9, 7

• 7, -11

• -9±√166

Solve by completing the square:

x²+2x+68=0

• -1±i√67

• 1, -11

• 7, -13

• -1±√51

Solve by completing the square:

x²=20x-96

• -7±4i√3

• 12, 8

• 24, -4

• -14±3√11

Solve by completing the square:

9x²-18x+5=0

• 5/3, 1/3

• 2/3, -8/3

• (-3±i√174)/3

• (2±i√46)/2

Solve by using the quadratic formula:

3x²-4x-39=0

• 13/3, -3

• 3, -5

• -1±i√14

• 1±i√14

Solve by using the quadratic formula:

x²-x+7=0

• (1±3i√3)/2

• (±i√11)/2

• (-1±i√671)/16

• (1±√673)/16

Solve by using the quadratic formula:

4x²+7x=92

• 4, -23/4

• (1±i√11)/6

• (-1±√13)/6

• (1±√13)/6

Solve by using the quadratic formula:

3x²+6x=7

• 1, -8/3

• (-3±√30)/3

• (-11±√569)/16

• (-3±2i√3)/3

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

Tags

CCSS.HSA-REI.B.4B

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

• Positive
• Negative
• Zero
• Not Sure

Tags

CCSS.HSA.REI.B.4