OpenStudy (anonymous):

$(7+\sqrt{2})(8-3\sqrt{2})$

OpenStudy (anonymous):

okay, so all we have to do is FOIL.

OpenStudy (anonymous):

you should get: $50-13\sqrt{2}$

OpenStudy (anonymous):

i did thank you

OpenStudy (anonymous):

Rationalize the denominator of

OpenStudy (anonymous):

$(7)(8)+(7)(-3\sqrt{2})+(\sqrt{2})(8)+(\sqrt{2})(-3\sqrt{2})$ $56-21\sqrt{2}+8\sqrt{2}-6$ $50-13\sqrt{2}$

OpenStudy (anonymous):

you can click the good answer button to thank people for their answer

OpenStudy (anonymous):

$\sqrt{50}/\sqrt{5}$

OpenStudy (anonymous):

how do u rationalize the denominator

OpenStudy (anonymous):

multiply to and bottom of that fraction by $\sqrt{5}$

OpenStudy (anonymous):

i am sorry thats wrong

OpenStudy (anonymous):

i got $\sqrt{10}$

OpenStudy (anonymous):

yeah, thats right

OpenStudy (anonymous):

i was thinking about something else

OpenStudy (anonymous):

or is it 5$5\sqrt{5}/2$

OpenStudy (anonymous):

no, its is $\sqrt{10}$

OpenStudy (anonymous):

how about Rationalize the denominator of $3/\sqrt{2}$

OpenStudy (anonymous):

When we multiply the top and bottom by $\sqrt{2}$ we get : $(3\sqrt{2})/(2)$