Friday Feedback - Solving Quadratic Equations

Solve
x² + 13x + 12 = 0

• x = -12, -1
• x = 12, 1
• x = 13, 1
• x = -13, -1

Tags

CCSS.HSA-REI.B.4B

ax²+bx+c=0  is the standard form of a quadratic equation.

• True
• False

The quadratic equation can be used to solve quadratic equations that cannot be factored.

• True
• False

Tags

CCSS.HSA-REI.B.4B

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

• Get factored form
• Write down: a=1, b=6, c=-13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Determine the values of

a, b, and c for

the quadratic equation:

4x² – 8x = 3 Hint: Make the equation equal to 0 first!

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

Factor x²-11x+24

• (x-3)(x-8)
• (x-2)(x-12)
• (x+3)(x+8)
• (x+2)(x+12)

Solve the equation:

5x² - 35x + 60 = 0

Hint: See the graph

• x = 3, -4

• x = -3, 4

• x = 3, 4

• x = -3, -4

Factor x²-11x+24

• (x-3)(x-8)
• (x-2)(x-12)
• (x+3)(x+8)
• (x+2)(x+12)

Solve the following quadratic equation...

x² + 3x + 2 = 0

Hint: See the graph or set factors equal to 0 and solve.

• x = -1

  x = -2

• x = 1

  x = 2

• x = -1

  x = 2

• x = 1

  x = -2

Solve the following quadratic equation...

x² - 13x + 30 = 0

Hint: See the graph or set factors equal to 0 and solve.

• x = 10

  x = 3

• x = -10

  x = -3

• x = 5

  x = 6

• x = -5

  x = -6