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2 cards from this section. Quick, good the night before a test.
Factor the equation: x² + 6x + 8 = 0.
Find two numbers that add to 6 and multiply to 8.
What are the roots of x² + 10x + 21 = 0?
Look for factors of 21 that add to 10.
What is the first step in the factorization method?
Consider how you get to the roots.
True or False: The process of finding the linear factors of a quadratic is called expansion.
Think about what the term means.
Factor and solve the equation x² - 5x + 6 = 0. Verify the roots.
What two numbers multiply to 6 and add to -5?
A quadratic equation has roots 3 and -1. Write the equation in standard form.
Use the roots to reverse-engineer the factors.
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