Question

Rezolvati expresia din imaginea de mai jos.

Answer 1

x≠5
x≠-5

[(x-6)/(x²-25) - x/(5-x)-2(x+5)] : (2x²+x-6)/(x²-25) =

=[(x-6)/(x+5)(x-5) + x/(x-5)-2(x+5)] : (x+2)(2x-3)/(x+5)(x-5) =

=(x-6+x²+5x-2x+10)/(x+5)(x-5)  × (x+5)(x-5)/(x+2)(2x-3) =

=(x²+4x+4)/(x+2)(2x-3) =

=(x+2)²/(x+2)(2x-3) =

=(x+2)/(2x-3)

x=a  
a+2 = 2a-3 
a=5