Solving Quadratic Equations - Cool math Algebra Help Lessons - Solving Quadratic Equations by Factoring

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Coolmath Algebra
Solving Quadratic Equations Lesson 3 - Freaky Things That Can Happen (page 3 of 3)
---- This algebra lesson explains the freaky things that can happen when you solve quadratic equations by factoring.

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One more thing: If you start with something like

ALWAYS move stuff around so your biggest power guy is positive.

12x = -2x^3 - 10x^2

Check it out:

12x = -2x^3 - 10x^2 ... add ( 2x^3 + 10x^2 ) to both sides, which gives 2x^3 + 10x^2 + 12x = 0

Now, we can solve it!

Factor: 2x ( x^2 + 5x + 6 ) = 0 which gives 2x ( x + 2 ) ( x + 3 ) = 0

Blobs = 0: 2x = 0 or x + 2 = 0 or x + 3 = 0 , which gives x = 0 or x = -2 or x = -3

YOUR TURN:

Solve

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