Question

$(\frac{a}{b} + \frac{b}{a} ) {}^{2}$
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Answer 1

$(\frac{a}{b} + \frac{b}{a})^{2} \\\\(\frac{a}{b})^{2} + 2 * \frac{a}{b} * \frac{b}{a} + (\frac{b}{a} )^{2} \\\\\frac{a^{2} }{b^{2} } + 2 + \frac{b^{2} }{a^{2}}$