tolong dijwb ya pake cara nomor 5 saja

5 a. 2(x²-1)/x²+2x+1
= 2(x+1)(x-1)/(x+1)²
= 2(x-1)/x+1
= 2x-2/x+1

b. (2x-1)(x+1)/(2x-1)(x+3)
= x+1/x+3

c. (x-3y)(x-2y)/(x+2y)(x-2y)
= x-3y/x+2y