Question

x=a+1/a and y=a-1/a so the value of x⁴ + y⁴-2x²y² is​

Answer 1

$( {x}^{4} + {y}^{4} - 2 {x}^{2} {y}^{2})$

$( {x}^{2} - {y}^{2}) {}^{2}$

$((x + y)(x - y)) {}^{2}$

$(2a \times \frac{2}{a}) {}^{2}$

$4 {}^{2}$

$16 \: is \: the \: answer.$