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2 cards from this section. Quick, good the night before a test.
Expand (x + 2)².
Use the identity (a + b)².
What is the result of (5 - 3)²?
What does squaring mean?
What is the expanded form of (a + b)²?
Remember the format for squaring a binomial.
True or False: a² + b² = (a + b)².
Think of the formula for squaring a sum.
Prove the identity a² - b² = (a + b)(a - b) using a visual aid.
Use area to show how they relate.
Create a simple real-world problem using (a + b)² to model a situation and solve it.
Think of how area measures combine.
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