3x^2+7x-6=0; D=7^2-4*3*(-6)=49+72=121; x1=(-7-11)/6, x2=(-7+11)/6. x1= -3, x2=2/3. 3x^2+7x-6=3*(x-2/3)*(x+3)=(3x-2)*(x+3).
3x^2+7x-6=0; D=7^2-4*3*(-6)=49+72=121; x1=(-7-11)/6, x2=(-7+11)/6. x1= -3, x2=2/3. 3x^2+7x-6=3*(x-2/3)*(x+3)=(3x-2)*(x+3).