Question

a-1/a = 4,then find the value of a²+1/a²​

Answer 1

$\huge{\orange{\underline{\purple{\mathscr{Solution}}}}}$

$(a+a1)2=a2+a21+2=16</p><p></p><p>(a−a1)=a2+a21−2=16−2−2=12=23</p><p></p><p>(a2−a21)=(a+a1)(a−a1)=(4)(23)=83</p><p></p><p>$