Question

Pliss no. 27-30 ada yg bisa? pakai jalan ya...

Answer 1

30.

= 1/(x-2) - 4/(x-2)(x+2)

= (x+2)/(x-2)(x+2) - 4/(x-2)(x+2)

= (x+2) - 4 /(x-2)(x+2)

= x-2/(x-2)(x+2)

= 1/x+2 = 1/4