Question

Find a^2+9/a^2=31 what is the value of a-3/a​

Answer 1

Answer:

a^2+9/a^2=31

a^2+(3/a)^2=31

a^2+(3/a)^2-6=31-6             Adding and subtracting 6 on both the sides

(a-3/a)^2=25

a-3/a=5

Therefore a-3/a=5