7x-1.... 5-2x...... 4x -3...... 1+4x
------ - --------- = -------- + ----------
3.......... 2x............4.............3x
2x(7x-1) - 3(5-2x) ........3x(4x - 3)+ 4(1+4x)
------------------------- = -------------------------------
6x...................................12x
14x² - 14x - 15 + 6x ........12x² - 9x+ 4+ 16x
----------------------------- = -------------------------------
6x...................................12x
14x² - 8x - 15 ...................12x² + 7x + 4
----------------------- = ---------------------------
6x ...................................12x
(14x² - 8x - 15)12x ....... 12x² + 7x + 4
---------------------------- = ---------------------------
6x ..
(14x² - 8x - 15)2 = 12x² + 7x + 4
28x² - 16x - 30 = 12x² + 7x + 4
28x² - 16x - 30 - 12x² - 7x - 4 =
16x² - 23x - 34 = 0
x1= 2,44..........x2= - 0,90
espero que te sirva, salu2!!!
