Основано на упр. 5, стр. 25.

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1. \(\dfrac{9-m^2}{m^2+m-12}=\) [ ];
2. \(\dfrac{2y+ 16}{y^2+2y-48}=\) [ ];
3. \(\dfrac{3x^2+20x-7}{9x^2-6x+1}=\) [ ];
4. \(\dfrac{4x^2+11x-3}{21x-4x^2-5}=\) [ ].