SOLUTION: 20^2+x^2=(2x)^2

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Question 190849: 20^2+x^2=(2x)^2

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
20^2+x^2=(2x)^2
400+x^2=4x^2
x^2-4x^2=-400
-3x^2=-400
x^2=-400/-3
x^2=133.3
x=sqrt133.3
x=11.547 ans.
Proof:
20^2+11.547^2=(2*11.547)^2
400+133.3=23.094^2
533.3=533.3