Question

$\frac{2x+1}{x-1} : (1- \frac{ 3x^{2} }{1- x^{2} })$
ajutor va rog mult imi trebuie pentru EN

Answer 1

(2x+1)/(x-1) :[(1-3x²/(1-x²)]=
=(2x+1)/(x-1) :(1-x²-3x²)/(1+x)(1-x)=
=(2x+1) ×(1+x)/(4x²-1)=
=(2x+1) ×(1+x)/(2x+1)(2x-1)=
=(1+x)/(2x-1)