z.1
(2x + 1)/(x - 2) - (3 - x) /(x + 1) =
=[ (2x +1)*(x + 1) - (3 - x)*(x - 2)]/[ (x -2)*( x + 1 ) ] =
= [ 2 x^2 +2x + x + 1 - ( 3x - 6 - x^2 + 2 x)]/[ (x - 2)*(x + 1) ] =
= [ 3 x^2 - 2 x + 7] /[ x^2 - x - 2 ]
===============================
z.2
(x ^3 + 7 x^2 + 7x - 16 ) : ( x - 4) = x^2 + 11 x + 51
- x^3 + 4 x^2
-----------------------
........ 11 x^2 + 7 x
...... - 11 x^2 + 44 x
------------------------------
................. 51 x - 16
............... - 51 x + 204
-----------------------------------
......................... 188 - reszta
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z.1
(2x + 1)/(x - 2) - (3 - x) /(x + 1) =
=[ (2x +1)*(x + 1) - (3 - x)*(x - 2)]/[ (x -2)*( x + 1 ) ] =
= [ 2 x^2 +2x + x + 1 - ( 3x - 6 - x^2 + 2 x)]/[ (x - 2)*(x + 1) ] =
= [ 3 x^2 - 2 x + 7] /[ x^2 - x - 2 ]
===============================
z.2
(x ^3 + 7 x^2 + 7x - 16 ) : ( x - 4) = x^2 + 11 x + 51
- x^3 + 4 x^2
-----------------------
........ 11 x^2 + 7 x
...... - 11 x^2 + 44 x
------------------------------
................. 51 x - 16
............... - 51 x + 204
-----------------------------------
......................... 188 - reszta