SOLUTION: How do I solve radical 7 times 3 radical 14 minus radical 7 times radical 21? Alg2/Trig

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Question 536420: How do I solve radical 7 times 3 radical 14 minus radical 7 times radical 21? Alg2/Trig
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
Remember that if z=x*y then sqrt%28z%29=sqrt%28x%2Ay%29


The key to these problems is factoring what's inside the square root to factors that include perfect squares. Then you can remove the perfect square factor (square root it.) Or, find factors that are the same as another factor in a radical, multiply them together to get the number itself.


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