# Pythagoras Theorem

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If the sides of the triangle are a, b and c (where c is the long side), Pythagoras found that the square of a, added to the square of b equals the square of c, so in your case x squared equals (x-3) squared + 6 squared

28 June 2011

x^2 = (x-3)^2 + 6^2 = (x-3) (x-3) + 36 = x^2 -6x +9 + 36

28 June 2011

therefore: X^2 = X^2-6X +45 and 6X = 45

28 June 2011

it's late, so please check my workings!

28 June 2011

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