Odpowiedź:
[tex]( \frac{3}{4} x + 1)(4x - \frac{2}{3} ) = \\ \frac{3}{4} x \times 4x - \frac{3}{4} x \times \frac{2}{3} + 4x - \frac{2}{3} = \\ 3x \times x - \frac{1}{2} x + 4x - \frac{2}{3} = \\ 3 {x}^{2} - \frac{1}{2} x + 4x - \frac{2}{3} = \\ 3 {x}^{2} + \frac{7}{2} x - \frac{2}{3} [/tex]
