Solving Quadratics by graphing and taking square roots

What are the solutions?

• 0 and 8
• -2 and -4
• 3 and -1
• 2 and 4

What is the greatest number of solutions that a Quadratic Equation can have?

• 0
• 1
• 2
• 3

Which is a zero of the graph?

• 0
• -1
• 1.5
• -3

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

Find the roots

• x = -1 x = 3

• x = -2 x = 3

• x = -1 x = 4

Solve by taking the square root:

x² = 49

• -7

• 7

• 49

• ±7

Solve by taking square roots:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solutionb

Solve for x.

(x - 7)² + 4 = 40

• x = -1, -13

• x = 1, 7

• x = -1, -7

• x = 1, 13

• x = -7, -13

Taking square roots to solve a quadratic equation is an appropriate method when

• a = 4

• a is negative

• b = 0

• c = 0