Solving Quadratic Equations with Square Roots

What is the degree of every Quadratic Equation?

• 1
• 2
• 3
• 4

Solve the equation using square roots.
x² = 121

• 60.5
• ± 11
• ± 12
• 11

Solve by taking square roots:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no real solution

When solving a quadratic equation, when do you use the plus or minus (±) symbol?

• After taking the square root of both sides

• After adding the square to both sides

• After taking half of b

• After setting the equation equal to zero

• {49,-49}

• {8,-8}

• {7,-7}

• No Solution

• {6.78,-6.78}

• {8,-8}

• {7,-7}

• No Solution

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

x² = 16

• ± 4
• ± 8
• 4
• 8

-5x² = -50

• ± 5
• ± 10
• ± √10
• -10

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8