May 13 Solving Quadratic Equations with Square Roots

x²=25

• x = 5
• x = -5
• x = ±25
• x = ±5

Tags

CCSS.HSA.REI.B.4

Solve the equation using square roots.
x² = 121

• 60.5
• ± 11
• ± 12
• 11

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Use the square root property to solve the Quadratic Equation.

x² = -49

• ± 7

• -7

• ± 2401

• no real solution

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Solve by the Extraction of Roots method: x² = 16

• ± 4

• ± 8

• 4

• 8

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve by taking square roots.
 $x^2=81$  

•  $\left\{40.5\right\}$  

•  $\left\{9\right\}$  

•  $\left\{\pm\ 9\right\}$  

•  $\left\{0,\ 9\right\}$  

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

2x²= 30

• x= √5
• x= √30
• x= √15
• x= ±5

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

Solve by finding square roots and simplify completely:
 $2x^2=20$ 

•  $x=\pm10$  

•  $x=\sqrt{10}$  

•  $x=\pm\sqrt{10}$  

• No real solutions

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

Solve by taking the square root:

4x² = 100

• x = ±10

• x = ±25

• x = ±5

• x = 5

Tags

CCSS.HSA.REI.A.2

CCSS.HSA.REI.B.4

What are the roots / solutions of the quadratic equation 3x² = 300 ?

• x = 10

• x = 9

• x = + 9

• x = + 10

Tags

CCSS.HSA.REI.B.4

Solve x²− 4 = 0

•  2 and -2
• 4 and -4
• 16 and -16
• 8 and -8

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.REI.B.4