(1/x 2/y) (2/x - 1/y) simplify..........an assignment so pls!!!my previous question WAS WRONG

Question

Pls show me the steps of calculations.there r many answers to this question that i did n my dad.so,i dont know whether it's my answer is correct or my dad's.btw,i've lost the calculations my dad did.ooopppss

Answer 1

(1/x +2/y) (2/x - 1/y)

means

(1/x * 2/x ) +1/x* -1/y  +( 2/y*2/x) +2/y *-1/y

(2/x^2) -1/xy +4 / xy   - 2 y^2

(2/x^2) + 3 / xy  - 2 y^2

Answer 2

(1/x + 2/y) (2/x - 1/y)

= (1/x * 2/x) - (1/x * 1/y) + (2/y * 2/x) - (2/y * 1/y)

= (2/x^2) - (1/xy) + (4/xy) - (2/y^2)

= 2/x^2 + 3/xy - 2/y^2