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navik [9.2K]
3 years ago
12

一、225 + 4.8 I don’t understand it plz help (And do it step by step...)

Mathematics
1 answer:
nalin [4]3 years ago
5 0

\bf -\sqrt{225}+4.8~~ \begin{cases} 225=&3\cdot 3\cdot 5\cdot 5\\ &3^2\cdot 5^2\\ &(3\cdot 5)^2\\ &15^2 \end{cases}\\\\\\ -\sqrt{15^2}+4.8\implies -15+4.8\implies -10.2

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