Question

if m-1/m =5 find: m2-1/m2​

Answer 1

Step-by-step explanation:

) m2 – (1/m2) = (m + (1/m)) (m – (1/m))

= 5(m + (1/m))

Now, (m + (1/m))2 = (m – (1/m))2 + 4

= (5)2 + 4 = 25 + 4 = 29

∴ m + (1/m) =

∴ m2 – (1/m2) = (5) ( ) 5

Answer 2

Answer:

Step-by-step explanation:

m-1/m =5

m2-1/m2​=(m-1/m)2-2m.1/m(m-1/m)

      =5square-2x5

     =25-10=5