Math 3 Semester 2 Final Practice

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

• square it
• divide it by 2 and square the result
• divide it by 2 and take the square root of the result
• divide it by 2 only

When do you use the plus or minus symbol?
±

• After taking the square root of both sides
• After adding the square to both sides
• After taking half of b
• After setting the equation equal to zero

What is one of the solutions to this equation?
(2x - 1)² = 49

• 7
• -7
• -4
• -3

Complete the Square x² + 6x - 5 = 0

• (x + 3)² = 5
• (x + 6)² = 9
• (x + 3)² = 14
• (x + 6)² = 14

Complete the Square
x² + 6x + 5

• (x + 3)² - 4
• (x + 6)² - 4
• (x + 3x)² - 4
• (x + 3)² + 9

Complete the Square
x² + 6x + 20

• (x + 3x)² + 11
• (x + 3)² + 11
• (x + 6)² + 11
• (x + 3)² + 29

Solve the following equation by completing the square:
n² - 2n - 3 = 0

• {3, -1}
• {4, -4}
• {5, -3}
• {8, -7}

What are the zeros of the function:

f(x) = x² + x - 42

• 7 and -6

• 1 and 42

• -7 and 6

• 8 and -3

The x-intercepts of

y = x² + 9x + 8 are...

• -8 and -1

• 9 and -1

• -4 and -2

• 9 and 8

Solve: x² - 6x + 5 = 0

• -3 and -2

• -6 and 1

• 5 and 1

• -1 and -5