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3 cards from this section. Quick, good the night before a test.
Expand (x + 5)² using the identity.
Remember the formula (a + b)².
What does a² - b² factor to?
Think about the difference of squares.
What does the identity (a + b)² equal?
Remember to sum squares and include the product term.
True or False: The difference of squares states that a² - b² can be factored as (a - b)(a + b).
Keep the order for positive and negative signs in mind.
Prove the identity (2x + 3)² = 4x² + 12x + 9 and justify each step of your solution.
Remember to separate each term carefully.
Given a² - b² = (a - b)(a + b), how would you use this to find values if a=5 and b=3?
Factor first and calculate each side for verification.
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