Completing the square

Front

First step to solve by completing the square: a² + 10a + 21 = 0

Back

Subtract the 21

Front

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

Back

divide it by 2 and square the result

Front

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

Back

2

Front

What value of c would make this a perfect square trinomial?
x² +8x + c

Back

16

Front

Complete the Square
x² + 6x = 5

Back

(x + 3)² = 14

Front

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

Back

{6 + √13, 6 - √13}

Front

Solve by completing the square.
y² + 10y = -9

Back

-1 and -9

Front

Solve by completing the square: x² - 4x = 5

Back

5 and -1