Răspuns:
Explicație pas cu pas:
8
a) =(x-1)(x+1)/(x-1)²=(x+1)/(x-1) x≠1
b) (x-2)²/(x-2)(x+2)=(x-2)/(x+2) x≠±2
c) (x-3)(x+3)/(x+3)²=(x-3)/(x+3) x≠-3
9
a) (x-1)(x+1)/(x+2)(x-1)=(x+1)/(x+2) x≠-2si 1
b) (x-2)(x+2)/(x-5)(x+2)=(x-2)/(x-5) x≠-2 si5
c) (x-3)(x-4)/(x-3)(x+3)=(x-4)/(x+3) x≠±3
d) (x-4)(x+4)/(x-4)(x+1)=(x+4)/(x+1) x≠-1 si 4
