alleryStart learning →Which three-term expression is the square of a sum, (a+b)²?
Aa² + 2ab − b²
Ba² + 2ab + b²
Ca² − 2ab + b²
Da² + ab + b²
Answer & Solution
Correct answer: B. a² + 2ab + b²
Multiplying a + b by itself produces a², two copies of ab, and b².
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