Question

(2x plus 5)(2x-3)-(x-2)(x-3)-(3x-2)(2x plus 5) va rog am nevoie de ajutor

Answer 1

$(2x + 5)(2x - 3) - (x - 2)(x - 3) - (3x - 2)(2x + 5)$

$= (4 {x}^{2} - 6 + 10x - 15) - ( {x}^{2} - 3x - 2x + 6) - ( {6x}^{2} + 15x - 4x - 10)$

$= {4x}^{2} - 6 + 10x - 15 - {x}^{2} + 3x + 2x - 6 - {6x}^{2} - 15x + 4x + 10$

$= - 3 {x}^{2} + 4x - 17$