Answer to Question #283643 in Algebra for Ali

Question #283643

If ( x*2 +1/x)*2 =15

Then x=1/x=?

Expert's answer

"(2x+\\frac{1}{x})*2=15".

"4x+\\frac{2}{x}=15."

"4x^2-15x+2=0."

"x_1=\\frac{15-\\sqrt{193}}{8}\\approx 0.1384."

"x_2=\\frac{15+\\sqrt{193}}{8}\\approx 3.6116."

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