$6x^2-11x-10=0$ $6x^2-15x+4x-10=0$ $3x(2x-5)+2(2x-5)=0$ $(3x+2)(2x-5)=0$ $3x+2=0$ of $2x-5=0$ $3x=-2$ of $2x=5$ $x=-\frac{2}{3}$ of $x=2\frac{1}{2}$