Solving Quadratics

3x² = 12

• ± 2
• 2
• ± √12
• ± 4

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solution

• x = 3  or   x = -3

• no solutions

• x = 6 or x = -6

• x = 3

• x = 9 or x = -9

• no solutions

• x = 2 or x = -2

• x = 81 or x = -81

Solve by taking square roots:
5m² + 1 = 6

• m = 0
• m = 1 or -1
• m = √7
• m = 7/5 m = -7/5

Solve for x     x² - 4 = 76

• x = 4 , -4
• x = 4√5    ,  -4√5
• x = 80   ,  x = -80
• x = 5√4    or    -5√4