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ab = 2
+ 2ab
Hallar:
√(a² + b² + 4)
(a - b)² = 9
a² - 2ab + b² = 9
a² + b² = 9 + 2ab
a² + b² = 9 + 2(2)
a² + b² = 9 + 4 = 13
Hallar:
√(a² + b² + 4)
√(13 + 4) = √17 = 4.123