x+19x=4,x+19x=4,x + \frac{1}{{9x}} = 4{\text{,}} then 9x2+19x2" role="presentation">9x2+19x29x2+19x2{\text{9}}{x^2} + \frac{1}{{9{x^2}}} is?" /> x+19x=4,x+19x=4,x + \frac{1}{{9x}} = 4{\text{,}} then 9x2+19x2" role="presentation">9x2+19x29x2+19x2{\text{9}}{x^2} + \frac{1}{{9{x^2}}} is?" /> x+19x=4,x+19x=4,x + \frac{1}{{9x}} = 4{\text{,}} then 9x2+19x2" role="presentation">9x2+19x29x2+19x2{\text{9}}{x^2} + \frac{1}{{9{x^2}}} is?" />
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