Question

Спростити вираз (x-7)(3x-2)-(5x+1)(2x-4)

Answer 1

$(x - 7)(3x - 2) - (5x + 1)(2x - 4) = 3 {x}^{2} - 21x - 2x + 14 - (10 {x}^{2} + 2x - 20x - 4) = 3 {x}^{2} - 23x + 14 - 10 {x}^{2} + 18x + 4 = - 7 {x}^{2} - 5x + 18$