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What is 5√28 + √63 in simplest radical form? PLEASE HELP ME!

What is 5√28 + √63 in simplest radical form? PLEASE HELP ME!
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What is 5√28 + √63 in simplest radical form?
PLEASE HELP ME!

User Sidoshi
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\bf 5√(28)+√(63)~~ \begin{cases} 28=2\cdot 2\cdot 7\\ \qquad 2^2\cdot 7\\ 63=3\cdot 3\cdot 7\\ \qquad 3^2\cdot 7 \end{cases}\implies 5√(2^2\cdot 7)+√(3^2\cdot 7) \\\\\\ 10√(7)+3√(7)\implies \stackrel{\textit{adding like-terms}}{13√(7)}

User Alejandro Andrade
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