SOLUTION: What are the steps to solving this rationalization? 9/2-(sqt7)

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Question 879800: What are the steps to solving this rationalization?
9/2-(sqt7)

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Multiply top and bottom by 2%2Bsqrt%287%29 (this is the conjugate of the denominator)


9%2F%282-sqrt%287%29%29


%289%282%2Bsqrt%287%29%29%29%2F%28%282-sqrt%287%29%29%282%2Bsqrt%287%29%29%29


%289%282%2Bsqrt%287%29%29%29%2F%28%282%29%5E2-%28sqrt%287%29%29%5E2%29


%289%282%2Bsqrt%287%29%29%29%2F%284-7%29


%289%282%2Bsqrt%287%29%29%29%2F%28-3%29


-3%282%2Bsqrt%287%29%29


-6-3sqrt%287%29


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So 9%2F%282-sqrt%287%29%29+=+-6-3sqrt%287%29