Quadratic Formula

The discriminant is

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

Tags

CCSS.HSA-REI.B.4B

What is the discriminant and how many solutions would this quadratic have?

4x² + 6x - 4 = 0

• -28, No Solutions

• 28, 2 Solutions

• 100, 2 Solutions

• -100, No Solutions

Tags

CCSS.HSA.REI.B.4

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

• -2, 3
• 2, 3
• 2, -3
• -2, -3

Tags

CCSS.HSA-REI.B.4B

In the equation
y = x² +5x +7, match each leading coefficient with its correct letter 

• a=0, b=5, c=7
• a=1, b=5, c=7
• a=7, b=5, c=1

Use the quadratic formula to find the solutions for
y = 2x² - 9x + 5

• -8.14 and -6.14
• 4.07 and 3.07
• 3.85 and 0.65
• ZERO solutions

Tags

CCSS.HSA.REI.B.4

If the discriminant is a negative number, then you will have

• one real solution

• two real solutions

• no real solutions

• infinite solutions

Tags

CCSS.HSA.REI.B.4

If the discriminant is a positive number, then you will have

• one real solution
• two real solutions
• no real solutions
• one imaginary solution

Tags

CCSS.HSA.REI.B.4

If the discriminant is 0 you will have:

• no real solutions
• two real solutions
• 1 real solution
• 1 imaginary solution

Tags

CCSS.HSA.REI.B.4

Solve using the Quadratic Formula

2x² + 7x − 15 = 0

• x = −1.5, 5

• No Solution

• x = −5, 1.5

• x = 0.7, 5

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

Solve using the Quadratic Formula:

x² + x − 56 = 0

• b = 7, −8

• b = −7, 8

• b = 1.8, −1.4

• b = 2.5, −0.5

Tags

CCSS.HSA.REI.B.4