Completing the Square & Discriminant

Front

What do you do to the b value to correctly complete the square?

Back

divide it by 2 and square the result

Front

Rewrite the equation by completing the square: x² + 6x = 5

Back

(x + 3)² = 14

Front

(x - __ )² = 20

Back

2

Front

Solve for x: (x + 6)² = 49

Back

x = 1, -13

Front

When do you use the plus or minus symbol (±)?

Back

After taking the square root of both sides

Front

Solve (Factor): 3x² + 18x +15 = 0 Hint: Factor GCF first.

Back

x = -5, -1

Front

What is the first question you ask yourself when factoring a polynomial?

Back

Is there a GCF?

Front

The discriminant is

Back

b² - 4ac

Front

What is the discriminant of -2x² − x − 1 = 0?

Back

-7

Front

A function has a discriminant of 25.
______________
How many solutions does it have?

Back

2