Question

Expand (2x - 1/x) (3x+ 2/x)​

Answer 1

$(2x-\frac{1}{x})(3x+\frac{2}{x}) \\= (2x)(3x) - (\frac{1}{x})(3x) + (\frac{2}{x})(2x) - (\frac{1}{x})(\frac{2}{x})\\= 6x^{2} +1 - \frac{2}{x^{2}}$