Odpowiedź:
[tex] \frac{3x - 9}{4} \times 8x = \frac{24 {x}^{2} - 72x}{4} [/tex]
[tex] \frac{24 {x}^{2} - 72x }{4} \div 3 = \frac{24 {x}^{2} - 72x }{4} \times \frac{1}{3} = \frac{24 {x}^{2} - 72x}{12} [/tex]
[tex] \frac{24 {x}^{2} - 72x }{12} \times \frac{1x}{2} = \frac{24 {x}^{3} - 72 {x}^{2} }{24} = \frac{ {x}^{3} - 3 {x}^{2} }{1} = {x}^{3} - 3 {x}^{2} [/tex]
