Question

2x elevado a la 2-18=0

Answer 1

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${2x}^{2} - 18 =0 \\ {2x}^{2} = 18 \\ {x}^{2} = \frac{18}{2} \\ {x}^{2} = 9 \\ x = \sqrt{9} \\ x = 3 \: \: \: o \: \: \: x = - 3$