- Review different methods of factoring.
- Review how to solve equations.
Today I did more reviews of how to factor:
Decomposition
I worked out two examples of this method. It takes many steps but always works!
Criss Cross Method
Very fast if you get the numbers right, but might take a couple of tries if the first factors you choose don't work.
Perfect Square Trinomial A² ± 2AB + B² = (A ± B)²
This is a shortcut if you can recognize the pattern. Otherwise, either of the above two methods still works on these kind of problems.
Difference of Squares A² – B² = (A + B)(A – B)
If you see this pattern it's a one step problem!
Next we reviewed how to solve equations. I show more steps than are necessary just to be clear:
Quadratic equations can be solved by factoring or by using the quadratic formula.
For homework please complete the Solving Equations handout (both sides!) as well as the Factoring Handout (Part A: Factoring).
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