D = (2x - 3) (3x - 1) + (2x -3) ² Merci d'avance :))

D = (2x - 3) (3x - 1) + (2x -3)² = 6x²- 2x - 9x + 3 + 4x² - 12x + 9 = 10x² - 23x + 12

[tex](2x-3)(3x-1) + (2x-3) ^{2} [/tex]
= [tex](2x-3)(3x-1) + (2x-3)(2x-3)[/tex]
= [tex](2x-3) * [ (3x-1) + (2x-3) ][/tex]
= [tex](2x-3) * [ 3x-1 + 2x-3 ][/tex]
= [tex](2x-3) * (5x -4)[/tex]
= [tex]2x * 5x - 2x * 4 - 3 * 5x + 3 * 4[/tex]
= [tex]10x ^{2} - 8x - 15x + 12[/tex]
= [tex]10 x^{2} - 23x + 12[/tex]