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Mathematics 20 Online
OpenStudy (whereisthefloor):

simply simplify !

OpenStudy (phi):

how many \( \sqrt{7} \)'s do you have? any idea ?

OpenStudy (whereisthefloor):

two

OpenStudy (phi):

it says you have 5 and then take away 10 of them

OpenStudy (whereisthefloor):

-5

OpenStudy (phi):

yes, so you have \[ -5 \sqrt{7} \] now do the \( \sqrt{6} \)'s

OpenStudy (whereisthefloor):

5-12= 8 8

OpenStudy (phi):

I see \[ 12 \sqrt{6}- 5 \sqrt{6} \] what is 12-5?

OpenStudy (whereisthefloor):

7

OpenStudy (phi):

yes, so you have 7 \(\sqrt{6} \) can you pick out the answer ?

OpenStudy (whereisthefloor):

the last one?

OpenStudy (phi):

yes, the last one shows \[ 7 \sqrt{6} - 5 \sqrt{7} \] which is what we have (notice the order does not matter)

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