solving quadratic equations by formula and factoring

Factor x²-6x-40

• (x-10)(x+4)
• (x+10)(x-4)
• (x-8)(x+5)
• (x+8)(x-5)

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Find two numbers which add to make 6 and multiply to make -13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Solve by factoring:

n² - 2n = 0

• n = 2 and 0

• n = -2 and 0

• n = 2

• n = 0

Solve using any form of factoring or Quadratic Formula

x² + 6x + 9 = 0

• x = −3, 3

• x = −3

• x = 3

• No Solution

Solve using the Quadratic Formula:

2x² − x − 3 = 0

Solve for the values of x:

(x + 2)(x - 3) = 0

• { 2, 3 }

• { -2, -3 }

• { 2, 3 }

• { -2, 3 }

The vertex of a quadratic function or graph is

• The highest point of the graph

• The lowest point of the graph

• Where the axis of symmetry passes through

• Where the graph crosses the x-axis

How many roots can a quadratic function have?

(select all that are true)

• 0

• 1

• 2

• Infinite