Sederhanakan pecahan berikuta. 3/x+5 - 2/x-1b. x+2 /x-3 + x-4/x+5

Sederhanakan pecahan berikuta. 3/x+5 – 2/x-1b. x+2 /x-3 + x-4/x+5

A.
$frac{3}{x + 5} - frac{2}{x - 1}$
dikali silang,
3(x – 1) – 2(x + 5)
3x – 3 – 2x – 10
= x – 13

b.
$frac{x + 2}{x - 3} + frac{x - 4}{x + 5}$
dikali silang,
(x + 2)(x + 5) + (x – 4)(x – 3)
x² + 5x + 2x + 10 + x² – 3x – 4x + 12
x² + 7x + 10 + x² – 7x + 12
= 2x² + 22
= 2(x² + 11)