Question

2(a^2+1/a^2)-(a-1/a)-7​

Answer 1

Answer:

$2\left(\frac{a^2+1}{a^2}\right)-\left(\frac{a-1}{a}\right)-7\\\\= 2\cdot \frac{a^2+1}{a^2}-\frac{a-1}{a}-7\\\\= \frac{2\left(a^2+1\right)}{a^2}-\frac{a-1}{a}-7\\\\= \frac{a^2+a+2}{a^2}-7$

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