Question

1. Найдите : а) √49 ; б) √144; в) √729
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Answer 1

$\sqrt{49} = \sqrt{7 {}^{2} } = 7 \\ \\ \sqrt{144} = \sqrt{12 {}^{2} } = 12 \\ \\ \sqrt{729} = \sqrt{27 {}^{2} } = 27$