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2014-11-10T22:19:05+02:00
X²+3⁴=15² x²+81=225 x²=225-81 x²=144 x=√144 x=12
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2014-11-10T22:21:18+02:00
X²+3⁴=15²
15²=225
3⁴=81
x²=225-81⇒x²=144⇒x=12