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Mathematics, 01.06.2021 22:40 cferguson

Which expression results in a rational number? 1)
2)
3)
4)
PLS HELP :) ​


\sqrt{121}  -  \sqrt{21}
\sqrt{25}  \times  \sqrt{50}
\sqrt{36}  +  \sqrt{225}
3 \sqrt{5}  + 2 \sqrt{5}

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Which expression results in a rational number? 1)

2)

3)

4)
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