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Mathematics 15 Online
OpenStudy (anonymous):

simplify the radical expression

OpenStudy (anonymous):

\[\sqrt{14q} * 2 \sqrt{4q}\]

OpenStudy (anonymous):

my guess for the answer is \[4 \sqrt{14q^2}\]

OpenStudy (asnaseer):

better not to /guess/ :) here you need to make use of the rule:\[\sqrt{a}\times\sqrt{b}=\sqrt{a\times b}\]

OpenStudy (asnaseer):

in this particular case, you spotted that \(\sqrt{4}=2\) and combined it with the 2 outside the square root to give you the 4 in your /guess/ that is correct

OpenStudy (asnaseer):

however, notice that you are left with a \(q^2\) inside the square root

OpenStudy (asnaseer):

can you see how to simplify it further?

OpenStudy (anonymous):

according to what you said.. i think the answer would be \[4q \sqrt{14}\]

OpenStudy (asnaseer):

perfect! :)

OpenStudy (anonymous):

yay!! :D Thanks for you help :)

OpenStudy (asnaseer):

yw :)

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