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Mathematics 18 Online
OpenStudy (anonymous):

Simplify

OpenStudy (anonymous):

OpenStudy (solomonzelman):

Hint: \(\large\color{black}{ \displaystyle 8=4\times 2 }\)

OpenStudy (anonymous):

B?

OpenStudy (solomonzelman):

you are taking the square root of the 4, \(\large\color{black}{ \displaystyle \sqrt{8}=\sqrt{4}\times \sqrt{2} }\) (like this)

OpenStudy (solomonzelman):

\(\large\color{black}{ \displaystyle \sqrt{4} }\) is equal to what ?

OpenStudy (anonymous):

2

OpenStudy (anonymous):

oh 4

OpenStudy (solomonzelman):

yes, so \(\large\color{black}{ \displaystyle \sqrt{4}\times \sqrt{2} }\) is same as \(\large\color{black}{ \displaystyle 2\times \sqrt{2} }\)

OpenStudy (solomonzelman):

\(\large\color{black}{ \displaystyle 2 \times 2=4 }\) but, \(\large\color{black}{ \displaystyle 2\times \sqrt{2}\ne4 }\)

OpenStudy (anonymous):

D

OpenStudy (solomonzelman):

yup

OpenStudy (anonymous):

thanks

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