Doprowadź wyrażenie do najprostszej postaci W=
(x+3)(x²-4) / (x² + x -6) = (x+3)(x-2)(x+2) / ( x-2)(x+3) = x + 2
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(x+3)(x²-4) / (x² + x -6) = (x+3)(x-2)(x+2) / ( x-2)(x+3) = x + 2