SOLUTION: √63 + √7 + √64 = ? The correct answer is 4√7 + 8, but I can't figure out how to get it. Thanks

Algebra ->  Square-cubic-other-roots -> SOLUTION: √63 + √7 + √64 = ? The correct answer is 4√7 + 8, but I can't figure out how to get it. Thanks      Log On


   

Question 559492: √63 + √7 + √64 = ?
The correct answer is 4√7 + 8, but I can't figure out how to get it.
Thanks
Found 2 solutions by Earlsdon, richard1234:
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Simplify:
sqrt%2863%29%2Bsqrt%287%29%2Bsqrt%2864%29
sqrt%2863%29+=+sqrt%289%2A7%29=3sqrt%287%29
sqrt%2864%29+=+8 or -8 so...
sqrt%2863%29%2Bsqrt%287%29%2Bsqrt%2864%29+=+3sqrt%287%29%2Bsqrt%287%29%2B8 = 4sqrt%287%29%2B8 or 4sqrt%287%29-8

Answer by richard1234(7193) About Me  (Show Source):