SOLUTION: If x=3+√5, then the value of x-1/x will be Solution without calculator 3-√5 2.25+1.25√2 6

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: If x=3+√5, then the value of x-1/x will be Solution without calculator 3-√5 2.25+1.25√2 6      Log On


   

Question 1135749: If x=3+√5, then the value of x-1/x will be
Solution without calculator
3-√5
2.25+1.25√2
6
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
+%283%2Bsqrt%285%29%29-%281%2F%283%2Bsqrt%285%29%29%29+ =

=

+%283%2Bsqrt%285%29%29-%283-sqrt%285%29%29%2F%284%29%29+ =

+%28%2812%2B4%2Asqrt%285%29-3%2Bsqrt%285%29%29%2F4%29+ =

+%28%289%2B5%2Asqrt%285%29%29%2F4%29+ =

+highlight%282.25%2B1.25%2Asqrt%285%29%29+

It looks as though choice C (+sqrt%282%29+ may be a typo ?)