Solving Quadratics Bingo! ©2010, Dr. Jennifer L. Bell, LaGrange High School, LaGrange, Georgia Adapted from various sources

~BINGO!~ The winner who says “BINGO” at the appropriate time will get a mystery prize! Anyone acting poorly will be disqualified.

Numbers Place the following numbers in any empty box along with a FREE space. These numbers represent answers to quadratic equations. 0, 6 ±4i ±3 2±i -5/3, 1 ±2i√3 1±√6 -1/2, -7 ±2i√2 2±2√3 1, -7 -3±√69/10 ±2√3 0, 8 ±i√11 10, 1 -7±√33/2 11/2, -1 1±3i√3/2 4±3i√2/2 3 1/3, 7 -1±2i -2±√6

1 Solve by factoring. 2x2 + 15x + 7 = 0

2 Solve by factoring. 3x2 + 2x – 5 = 0

3 Solve by factoring. –x2 + 16x – 12 = 5x – 2

4 Solve by factoring. 3x2 – 9x = x2 + 11

5 Solve by factoring. 3x2 + 7 = 22x

6 Solve by factoring. 2x2 – 12x = 0

7 Solve by factoring. 3x2 – 24x + 4 = 4

8 Solve by factoring. -x2 + 6x – 9 = 0

9 Solve by taking the square root. x2 + 12 = 24

10 Solve by taking the square root. 2x2 + 24 = -8

11 Solve by taking the square root. 5 – 3x2 = 29

12 Solve by taking the square root. (x + 3)2 = 16

13 Solve by taking the square root. (x – 2)2 = 12

14 Solve by taking the square root. 20 – 2x2 = 2

15 Solve by taking the square root. 4x2 = 3x2 – 11

16 Solve by taking the square root. 3x2 = x2 – 12

17 Solve by using the quadratic formula. x2 + 2x – 5 = 0

18 Solve by using the quadratic formula. x2 + 9x + 1 = 2x – 3

19 Solve by using the quadratic formula. 5x2 + 3x – 3 = 0

20 Solve by using the quadratic formula. x2 + 3x + 13 = x + 8

21 Solve by using the quadratic formula. x2 + 4x – 2 = 0

22 Solve by using the quadratic formula. x2 + 7 = x

23 Solve by using the quadratic formula. x2 – 4x = -5

24 Solve by using the quadratic formula. 2x2 – 8x – 1 = 0

answers 1 -1/2, -7 9 ±2√3 17 1±√6 2 -5/3, 1 10 ±4i 18 -7±√33/2 3 10, 1 11 ±2i√2 19 -3±√69/10 4 11/2, -1 12 1, -7 20 -1±2i 5 1/3, 7 13 2±2√3 21 -2±√6 6 0, 6 14 ±3 22 1±3i√3/2 7 0, 8 15 ±i√11 23 2±i 8 16 ±2i√3 24 4±3i√2/2