√5+√x+12igual a3 mim respode por favor.... Pergunta de ideia deawannamoreira

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√5+√x+12igual a3 mim respode por favor

√5+√x+12 = 3
√5+√x = 3 - 12
√5+√x = -9
√x = -9-√5
(√x)² = (-9-√5)²
x = (-9)² - 2.(-9).√5 + (√5)²
x = 81 + 18√5 + 5
x = 86 + 18√5

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