Quadratic Square Roots

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

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

Tags

CCSS.HSA-REI.B.4B

• ± 1/4
• ± 9/36
• ± 1/2
• No real solution

Tags

CCSS.8.EE.A.2

x² = 25

• x = -5

• x = 5i, x = -5i

• x = 5

• x = 5, x = -5

Tags

CCSS.8.EE.A.2

x² = 289

• x = 12, -12

• x = 13, -13

• x = 14, -14

• x = 17, -17

Tags

CCSS.8.EE.A.2

How many solutions?

• one

• two

• three

• none

What  are the solutions of this graph?

• -2 and 3

• -1/2 and -6

• -2 and -6

• 3 and -6

x² = 64

• x = 8, -8

• x = 4, -4

• x = 32, -32

• No real solution

Tags

CCSS.8.EE.A.2

x² = 16

• 8

• +16, -16

• 32

• +4, -4

Tags

CCSS.8.EE.A.2

x² = 4

• +8, -8

• +2, -2

• no solution

• +4, -4

Tags

CCSS.8.EE.A.2

-5x² = -500

• +25, -25

• +10, -10

• +100, -100

• no solution

Tags

CCSS.8.EE.A.2