ValentinaT
Simplify the radical expression by rationalizing the denominator. 5/√30



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ValentinaT
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\[\frac{ 5 }{ \sqrt{30} }\]

anonymous
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multiply top and bottom by \(\sqrt{30}\)

anonymous
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then cancel the 5

Luigi0210
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\[\frac{ 5 }{ \sqrt{30} }*\frac{ \sqrt{30} }{ 30 }=\frac{ 5\sqrt{30} }{ 30 }=\frac{ \sqrt{30} }{ 6 }\]

ValentinaT
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Thank you!

Luigi0210
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Yup :P

ValentinaT
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Could you help me with one more?

ValentinaT
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Solve the equation. Identify any extraneous solutions.
√a = 2

Luigi0210
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we t solve for this you would square both sides..\[(\sqrt{a})^2=(2)^2\]
a=4

Luigi0210
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\[\sqrt{4}=\pm2\]

ValentinaT
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Thanks!

Luigi0210
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You're welcome :)