Question

expansion please answer​

Answer 1

Step-by-step explanation:

here is your answer

thank you

Answer 2

Step-by-step explanation:

$(a + \frac{1}{a})^{2} - {(a - \frac{1}{a}) }^{2} \\ = (\frac{ {a}^{2} + 1 }{a})^{2} - {(\frac{ {a}^{2} - 1}{a}})^{2} \\ = ( \frac{ {a}^{2} + 1 }{a} + \frac{ {a}^{2} - 1 }{a} )( \frac{ {a}^{2} + 1 }{a} - \frac{ {a}^{2} - 1}{a} )$

It's the expanded form,

Further solving

$= (\frac{2 {a}^{2} }{a} )( \frac{2}{a} ) \\ = \frac{4 {a}^{2} }{ {a}^{2} } \\ = 4$