If a^2 +2/(a^2)= 16, then find the value of (72a^2)/(a^4+2+8a^2).

If $a^2 +\frac{2}{a^2}= 16$,

then find the value of $\frac{72a^2}{a^4+2+8a^2}$

We can write $\frac{72a^2}{a^4+2+8a^2}$ by dividing numerator and denominator by a² as = $\frac{72}{a^2+\frac{2}{a^2}+8}$

Put the given value in the equation given above,

= $\frac{72}{16+8}$ = $\frac{72}{24}$ = 3