Помогите, пожалуйста, решить.
[tex] \frac{5x^{2}+4x}{4x^{2}-1 } - \frac{ x^{2}-1 }{4 x^{2} -1} [/tex]
[tex] \frac{5x^{2}+4x}{4x^{2}-1 } - \frac{ x^{2}-1 }{4 x^{2} -1} [/tex]
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(5х²+4х-х²+1)/(4х²-1)=(4х²+4х+1)/(2х+1)(2х-1)=(2х+1)(2х+1)/(2х+1)(2х-1)==(2х+1)/(2х-1) выделенное исократили