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ebaines · Mar 23, 2012, 09:52 AM

Not quite - you forgot to take the square root as the last step:

$<br /> x^2 + 600^2 = 650^2\\<br /> x^2 = 650^2 - 600^2 = 422500-360000 = 62500\\<br /> x = \sqrt{62500} = 250<br />$