SOLUTION: what is is the answer to the radical expression: 4 radical 18-3 radical 32+ radical 50 i dont know how to represent radical signs

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Question 7631: what is is the answer to the radical expression: 4 radical 18-3 radical 32+ radical 50

i dont know how to represent radical signs
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Ok, the problem is to simplify:4sqrt%2818%29+-+3sqrt%2832%29+%2B+sqrt%2850%29
First, factor the integers under the radical signs so as to get perfect squares, if possible:
4sqrt%282%2A9%29+-+3sqrt%282%2A16%29+%2B+sqrt%282%2A25%29 Then you can write this as follows:
4sqrt%282%29%2Asqrt%289%29+-+3sqrt%282%29%2Asqrt%2816%29+%2B+sqrt%282%29%2Asqrt%2825%29 Now take the square roots of the perfect square numbers, 9, 16, and 25:
4%2A3%2Asqrt%282%29+-+3%2A4%2Asqrt%282%29+%2B+5%2Asqrt%282%29 Simplify and collect like-terms:
12%2Asqrt%282%29+-+12%2Asqrt%282%29+%2B+5%2Asqrt%282%29 Finally, you have:
5%2Asqrt%282%29