SOLUTION: how we make quadratic equation?

Algebra.Com
Question 609126: how we make quadratic equation?
Found 2 solutions by Edwin McCravy, unlockmath:
Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!
   7-STEP RECIPE FOR MAKING A QUADRATIC EQUATION

1. Make up any two solutions that you want your quadratic equation
to have,  say x = -3 and x =  [You may even pick them the same!]

2. Write these equations down side by side:    x = -3 and    x = 

3. Clear of any fractions:                                  4x = 3

4. Get 0 on the right sides:             x + 3 = 0  and 4x - 3 = 0

5. Multiply equals by equals:                  (x + 3)(4x - 3) = 0

6. Foil out the left side:                  4x² - 3x + 12x - 9 = 0

7. Combine the middle two terms:                  4x² + 9x - 9 = 0

That's how to make a quadratic equation!

Edwin
Answer by unlockmath(1688)   (Show Source): You can put this solution on YOUR website!
Hello,
Here's one way.
Draw a rectangle and label the measurement of the width as x-2 and the length
as x+4. Let's suppose the area of the rectangle is 50 square feet.
We know the area is Width times Length so:
(x-2)(x+4)=50
Multiply this out and we get:
x^2+2x-8=50
There we go.
Make sense?
RJ
www.math-unlock.com
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