How much is x?
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Originally Posted by Nforce How much is x? (x - 3)^2 + x^2 = (x + 3)^2. Expand, simplify and solve for x.
i know i have to use pythagorean theorem, but i can's solve it. I always get x^2 = 12x
Originally Posted by Nforce i know i have to use pythagorean theorem, but i can's solve it. I always get x^2 = 12x x^2 - 12x = 0 => x(x - 12) = 0 => x = 0 (rejected) or x = 12.
yes, thanks... i forget that
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