9.4 Homework

• m = ±81

• m = ±9

• m = ±3

• No real solution

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

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

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

• {12.88,-12.88}

• {13.22,-13.22}

• {16}

• No real solution

What is another word for zeros?

• y-intercepts
• roots
• vertex
• axis of symmetry

Solve for x:

x² + 7 = 88

• x = ±81

• x = ±9

• x = ±3

• No real solution

If the graph of a quadratic does not intercept the x-axis at any point, then it has:

• 1 Real Solution
• 2 Real Solutions
• Half a Solution
• No Real Solution

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

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

Solve by taking square roots:
a² + 9 = 9

• no solution
• a = 0
• a = 3 or -3
• a = 18

Solve by taking the square root:

4x² = 100

• x = ±10

• x = ±25

• x = ±5

• x = 5