Question

Please help me, i need help soon

Answer 1

Explanation:

`m-(1)/(m)=3\\squaring ~both~sides\\(m-(1)/(m))^2=3^2\\m^2+(1)/(m^2)-2*m*(1)/(m)=9\\m^2+(1)/(m^2)=9+2=11\\squaring~again\\(m^2+(1)/(m^2))^2=(11)^2\\m^4+(1)/(m^4)+2*m^2*(1)/(m^2)=121\\m^4+(1)/(M^4)=121-2=119`