Question 313823
{{{ 2x^2+x-15=0 }}}
{{{ 2x^2+6x-5x-15=0 }}}
Group terms:
{{{ (2x^2+6x)-(5x+15)=0 }}}
{{{ 2x(x+3)-5(x+3)=0 }}}
{{{ (x+3)(2x-5)=0 }}}
.
x = {-3, 5/2}