Question

7 supra x+3 - 8 supra 5x-1
Va rog!

Answer 1

Răspuns

Explicație pas cu pas:

7/(x + 3) - 8 / (5x - 1) = [7(5x - 1) - 8(x + 3)] / (x + 3)(5x - 1) =

= (35x - 7 - 8x -24) / (x + 3)(5x - 1)  = (27x - 31)/(x + 3)(5x - 1)

Answer 2

Rezolvare :
$\frac{7}{x + 3} - \frac{8}{5x - 1} = \frac{7(5x - 1) - 8(x + 3)}{(x + 3) \times (5x - 1)} = \frac{35x - 7 - 8x - 24}{5x {}^{2} - x + 15x - 3 } = \frac{27x - 31}{5x {}^{2} + 14x - 3}$