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anonymous
 5 years ago
equation that I need help with is 8 over 3 plus sqrt 7
anonymous
 5 years ago
equation that I need help with is 8 over 3 plus sqrt 7

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dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0\[\frac{8}{3+\sqrt{7}}\]

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0well if it is multiply top and bottom by conjugate \[\frac{8}{3+\sqrt{7}}*\frac{3\sqrt{7}}{3\sqrt{7}}\] \[=\frac{248\sqrt{7}}{2}\] factor out a 2 on top which cancels the 2 on bottom leaving \[= 124\sqrt{7}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wonderful! how did you come up with the 8, though? is it that you must include the same number you multiply with in the top equation?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and how in the heck did you get 2?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh, never mind. thank you!

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0by distributing on top, FOIL on bottom your welcome :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0quick question for these types of problems, will the denominator always be 2?
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