[tex]Solution, \left(2x^2+4x-9\right)-\left(3x^2-2x+10\right)=-x^2+6x-19[/tex]
[tex]Steps:[/tex]
[tex]\mathrm{Remove\:parentheses}:\quad \left(a\right)=a, =2x^2+4x-9-\left(3x^2-2x+10\right)[/tex]
[tex]-\left(3x^2-2x+10\right):\quad -3x^2+2x-10\\[/tex]
[tex]=2x^2+4x-9-3x^2+2x-10[/tex][tex]\mathrm{Simplify}\:2x^2+4x-9-3x^2+2x-10:\quad -x^2+6x-19, =-x^2+6x-19[/tex]
