Question

Упростите выражение (Зх + 1) (4х - 2) - 6 (2х - I)^2 + 14.

Answer 1

(3x+1)(4x-2)-6(2x-1)²+14= 12x²-6x+4x-2-6(4x²+1-4x)+14= 12x²-2x-2-24x²-6+24x+14= -12х²+22х+6

Answer 2

(12x^2+4x-6x-2) - 6 (4x^2-4x+1) + 14 = 12x^2 + 4x - 6x -2 - 24x^2 + 24x - 6 + 14= - 12x^2 + 22x +6

Answer 3

верно)