[tex](5x + 4)(2x - 1) - (2x + 3)(x - 1) =10x {}^{2} - 5x + 8x - 4 - (2x {}^{2} - 2x + 3x - 3) = 10 {x}^{2} - 5x + 8x - 4 - (2x {}^{2} + x - 3) = 10x {}^{2} - 5x + 8x - 4 - 2x {}^{2} - x + 3 = 8x {}^{2} + 2x - 1[/tex]
