Solving Quadratic Equations Using Square Root Method

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

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

• x = 3  or   x = -3

• no solutions

• x = 6 or x = -6

• x = 3

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

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

3x² = 12

• ± 2
• 2
• ± √12
• ± 4

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

• x = 0

• no solutions

• x = 4 or x = -4

• x = 4

Tags

CCSS.HSA-REI.B.4B

Find the zeros of this quadratic.

• b=4/5, b=3
• b=4, b=-3
• b=1/5, b=3
• b=4/5, b=-3