Quadratic Formula and Discriminant Practice

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

• -2, 3

• 2, 3

• 2, -3

• -2, -3

If the discriminant is negative, then the quadratic has:

• 1 Real Solution

• 2 Real Solutions

• Half a Solution

• 2 Complex (imaginary) Solutions

What are the solutions to x² - 3x = 5?

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To prepare to do the quadratic formula,

set one side equal to zero:

-2x² = 7x - 4

• -2x² - 7x + 4 = 0

• -2x² +7x - 4 = 0

• -2x² - 7x - 4 = 0

• -2x² + 7x + 4 = 0

The discriminant is

• aX²  + bX  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac

If the discriminant is zero the quadratic has

• 1 real solution

• 2 real solutions

• 2 complex solutions

• 1 real and 1 non real solution

If the discriminant is negative, you will have....

• two real solutions

• two irrational solutions

• no real solution

• one real solution

The discriminant is

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac

What is the discriminant in the Quadratic Formula?

• -b + 4ac

• b - 4ac

• -b² - 4ac

• b² - 4ac

The discriminant formula is

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac