Uprość wyrażenia :
(4-x²)/(x²-2x) = (2+x)(2-x)/x(x-2) = -(2-x)(2+x)/x(x-2) = -(2+x)/x = (-2-x)/x
(x³-3x²)/(x²-6x+9) = x²(x-3)/(x-3)² = x²(x-3)/[(x-3)(x-3) = x²/(x-3)
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(4-x²)/(x²-2x) = (2+x)(2-x)/x(x-2) = -(2-x)(2+x)/x(x-2) = -(2+x)/x = (-2-x)/x
(x³-3x²)/(x²-6x+9) = x²(x-3)/(x-3)² = x²(x-3)/[(x-3)(x-3) = x²/(x-3)