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Question
solve for t. \sqrt{t} - 3 = 15 \
ewline t = \square
Step1: Isoler la racine carrée
$\sqrt{t} - 3 = 15$
$\sqrt{t} = 15 + 3$
$\sqrt{t} = 18$
Step2: Élever au carré des deux côtés
$(\sqrt{t})^2 = 18^2$
$t = 324$
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$t = 324$