3x^2+12x-2x-8-3(x^2-x+5x-5)=0
3x^2+12x-2x-8-3x^2+3x-15x+15=0
-2x+7=0
-2x=-7
x=3.5
1)(3х-2)*(х+4)=3х2+12х-2х-8=3х2+10х-8
2) 3*(х+5)*(х-1)= 3*(х2-х+5х-5)=3х2-3х+15х-15=3х2+12х-15
3) (3х2+10х-8) - (3х2+12х -15)=0
3х2+10х-8-3х2-12х+15=0
-2х=-7
х=3,5
3x^2+12x-2x-8-3(x^2-x+5x-5)=0
3x^2+12x-2x-8-3x^2+3x-15x+15=0
-2x+7=0
-2x=-7
x=3.5
1)(3х-2)*(х+4)=3х2+12х-2х-8=3х2+10х-8
2) 3*(х+5)*(х-1)= 3*(х2-х+5х-5)=3х2-3х+15х-15=3х2+12х-15
3) (3х2+10х-8) - (3х2+12х -15)=0
3х2+10х-8-3х2-12х+15=0
-2х=-7
х=3,5