Intro to Completing the Square

Find the value of c to make it a perfect square trinomial.

x²+5x+c

• 10

• 25

• 25/2

• 25/4

When factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4

• 2

• 8

• 20

Complete the square for
x² + 12x + ____

• x² + 12x + 144

• x² + 12x + 36

• x² + 12x - 36

• x² + +12x - 144

Complete the Square
x² + 10x + ____

• x² + 10x - 100

• x² + 10x + 100

• x² + 10x - 25

• x² + 10x + 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.
y² + 10y = -9

• 1 and -12

• -1 and -9

• 1 and -9

• 1 and -1

Solve by completing the square.
x² +12x = 5

• X = 6 + √41 or  6 − √41

• X= 35 or 47

• X = −6 + √41 or  −6 − √41

• X = √35 or √47

Solve by completing the square:
k² − 12k + 23 = 0

• {6 + √13, 6 - √13}

• {-6 + √13, -6 - √13}

• {6 + √59, 6 - √59}

• {-6 + √59, -6 - √59}

Find the value of "c" that completes the square.

• -121

• 121

• 11

• -11

Find the value of "c" that completes the square. Then rewrite the trinomial as a perfect square.