SOLUTION: My problem is C squared equals 8x squared(substituted for A) plus 15x squared(once again substituted) Since the question is an odd one, i got my answer of 23x squared but the boo

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Question 140716: My problem is C squared equals 8x squared(substituted for A) plus 15x squared(once again substituted)
Since the question is an odd one, i got my answer of 23x squared but the book got something different...
The book got 17x
i do not understand how they got that.
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
C^2=(8x)^2+(15x)^2
then
C^2= 64x^2+225x^2
C^2=289x^2
then
C= sqrt(289)x=17x