SOLUTION: how can i solve this problem: h"squared" + (30+h)"squared" = 150"squared"

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Question 485362: how can i solve this problem:
h"squared" + (30+h)"squared" = 150"squared"
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
h%5E2+%2B+%28h%2B30%29%5E2+=+22500
2h%5E2+%2B+60h+%2B+900+=+22500
h%5E2+%2B+30h+-+10800+=+0
(h + 120)*(h - 90) = 0
h = -120, 90