SOLUTION: 3 radical 7 - 2 radical 28

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Question 134295: 3 radical 7 - 2 radical 28
Answer by jim_thompson5910(21667) About Me  (Show Source):
You can put this solution on YOUR website!
3%2Asqrt%287%29-2%2Asqrt%2828%29 Start with the given expression


3%2Asqrt%287%29-2%2A2%2Asqrt%287%29 Simplify sqrt%2828%29 to get 2%2Asqrt%287%29. Note: If you need help with simplifying square roots, check out this solver.


3%2Asqrt%287%29-4%2Asqrt%287%29 Multiply 2 and 2 to get 4.

Since we have the common term sqrt%287%29, we can combine like terms


%283-4%29sqrt%287%29 Combine like terms.


-1%2Asqrt%287%29 Now simplify 3-4 to get -1


-sqrt%287%29 Simplify



So 3%2Asqrt%287%29-2%2Asqrt%2828%29 simplifies to -sqrt%287%29. In other words, 3%2Asqrt%287%29-2%2Asqrt%2828%29=-sqrt%287%29