Question

qual a raiz quadrada exata do numero 7,29?????

Answer 1

$\sqrt{7,29}=\sqrt{\frac{729}{100}}$

$\sqrt{7,29}=\frac{\sqrt{729}}{\sqrt{100}}$
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Fatorando 729, chegamos a 27²:

$729 = 27^{2}\\\sqrt{729}=\sqrt{27^{2}}\\\sqrt{729}=27$
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$\sqrt{7,29}=\frac{\sqrt{729}}{\sqrt{100}}\\\\\sqrt{7,29}=\frac{27}{10}\\\\\sqrt{7,29}=2,7$

Answer 2

$\sqrt{7,29}= 2,7$

Veja que (2,7).(2,7)=7,29