Evaluate each expression using (a+b)² (a-b)²identities?
3.3²
7.5²
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Answer:
(a+b)² = a² + b² + 2ab
3.3² = 3² + 0.3² + 2×3×0.3
= 9+ 0.09 +1.8
= 10.89
(a-b)² = a² + b² - 2ab
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