Completing the Square Rational

Complete the square for

x² + 12x + ____

(find the missing number in the blank)

• x² + 12x + 144

• x² + 12x + 36

• x² + 12x - 36

• x² + +12x - 144

Complete the square:

y²-16y+_=

• 24

• 64

• 56

• 72

Complete the square:

x²+18x+_

• 18

• 36

• 72

• 81

Is this a perfect square trinomial?
x² + 18x + 9

• Yes
• No

Is this a perfect square trinomial?
x² + 10x + 25

• Yes
• No

Extract the roots: 9x²=25

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

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

Solve by completing the square:

x² + 10x = -9

• x = 1 and -12

• x = -1 and -9

• x = 1 and -9

• x = 1 and -1

Solve by completing the square:

k² − 12k + 20 = 0

• k = 10 and 2

• k = -6 and -6

• k = 22 and -10

• k = -2 and 6

Solve by completing the square:

x² + 10x = 11

• x = 1 and -11

• x = 11 and -11

• x = 1 and -1

• x = 11 and -1