SOLUTION: how do you do the square root of 18 plus 2 times the square root of 80

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Question 222696: how do you do the square root of 18 plus 2 times the square root of 80
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
how do you do the square root of 18 plus 2 times the square root of 80
:
sqrt%2818%29+%2B+2%2Asqrt%2880%29
Factor inside the radicals to reveal the perfect squares
sqrt%289%2A2%29+%2B+2%2Asqrt%2816%2A5%29
extract the square roots
3%2Asqrt%282%29+%2B+2%2A4%2Asqrt%285%29
3%2Asqrt%282%29+%2B+8%2Asqrt%285%29; about all you can do with it