Null Factor Law
What is the Null Factor Law
If the product of two numbers is zero, then either/both of the two numbers is zero
- If ab=0, then either/both a=0 or b=0
What is completing the square?
When you add and subtract a value to a quadratic equation to be able to factor it into a perfect square
What is the quadratic formula?
x = -b +- sqrt(b2 - 4ac) /(2a)
How do you spell my last name?
Winzil
Solve the following quadratic equation by factoring. x2 - 5x=0
x = 0 or x = 5
Solve these quadratic equations by first completing the square. x2 + 4x - 4 = 0
x = - 2 +/- sqrt(8)
How do we know a quadratic function does not have solutions when using the quadratic formula?
There will be a negative number under the square root.
What subjects do I teach?
Maths and Physics
Solve the following equation by factoring. x2 - 9 = 0
x = -3 or x = 3
Solve these quadratic equations by first completing the square. x2 + 20x + 13 = 0
x = -10 +/- sqrt(87)
Identify a, b and c in the following equation:
x2 - 9x + 20 = 9
a = 1; b = -9; c = 11
Heads or Tails? If guessed correctly you get DOUBLE your points
Tails
Solve the following quadratic equation by factoring. x2 - 6x + 5 = 0
x = 5 x = 1
How many solutions are there for the following equation. x2 - 2x + 5 = 0
No Real Solutions
Solve the following quadratic equation by using the quadratic formula: 2x2 + 9x + 4 = 0
What are the first 5 digits of Pi?
3.1415
Solve the following quadratic equation by factoring. 3x2 - 4x - 15 = 0
x = -5/3 or x = 3
Solve these quadratic equations by first completing the square. 4x2 + 20x + 8 = 0
x = ( -5 +/- sqrt(17))/2
Solve the following quadratic equation by using the quadratic formula: 4x2 - 17x - 15 = 0
If you completed your test prior to this lesson, you get 500 points!
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