x/x-4 - x+1/4-x + 2x+3/x-4 ( / - oznacza kreskę ułamkową)
x x+1 2x+3 x(4-x) - (x+1)(x-4) + (2x+3)(4-x)
-------- + ---------- + ------------ = ------------------------------------------ =
x-4 4-x x-4 (x-4)(4-x)
4x - x² - x² +4x -x +4 +8x - 2x² + 12 -3x -4x² - 4x + 16 -4(x²+x-4)
= ------------------------------------------------------ = --------------------- = ----------------
(x-4)(4-x) (x-4)(4-x) (x-4)(4-x)
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x x+1 2x+3 x(4-x) - (x+1)(x-4) + (2x+3)(4-x)
-------- + ---------- + ------------ = ------------------------------------------ =
x-4 4-x x-4 (x-4)(4-x)
4x - x² - x² +4x -x +4 +8x - 2x² + 12 -3x -4x² - 4x + 16 -4(x²+x-4)
= ------------------------------------------------------ = --------------------- = ----------------
(x-4)(4-x) (x-4)(4-x) (x-4)(4-x)