СРОЧНО
(x+3)(x+4)=
(x-2)(x-6)=
(x+5)(x-3)=
(x-7)(x-2)=
(2x+1)(x-5)=
(x-6)(3x+2)=
(4x+2)(6x-8)=
(3x-5)(4x-7)=

1) ...=х^2+4х+3х+12=х^2+7х+122) ...=х^2-6х-2х+12=х^2-8х+123) ...=х^2-3х+5х-15=х^2+2х-154) ...=х^2-2х-7х+14=х^2-9х+145) ...=2х^2-10х+х-5=2х^2-9х-56) ...=3х^2+2х-18х-12=3х^2-16х-127) ...=24х^2-32х+12х-16=24х^2-20х+128) ...=12х^2-21х-20х+35=12х^2-41х+35