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20-01-2017
Mathematics

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3^2+x^2=9^2
What is X?

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20-01-2017

3^2+x^2=9^2
9 + x^2 = 81
x^2 = 81 - 9
x^2 = 72
x^2 = 6^2 * 2

x = 6√2 and x = - 6√2

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