Răspuns:
Explicație pas cu pas:
1
DVA =R\{5} x≠5
2.
3x(5x-1)/3x(5x+1)=(15x²-3x)/(15x²+3x)
3.
x^4×(x-1)^4/y^4 ×(x+1)^8
4.
2x/(x-3)+2×2/(x-3)=2x/(x-3)+2/(x-3)=2(x+1)/(x-3)
5.
(a+2)/(a-5):a(a+2)/(a-5)(a+5)=(a+2)/(a-5)×(a-5)(a+5)/a(a+2)
a≠±5 a≠0 a≠-2
=(a+5)/a=1+5/a
