[tex]Solution: \left(2x^2+4x-3\right)-\left(2x^2+4x-3\right)=0[/tex]
Steps:
[tex]\mathrm{Remove\:parentheses}:\quad \left(a\right)=a, =2x^2+4x-3-\left(2x^2+4x-3\right)[/tex]
[tex]-\left(2x^2+4x-3\right):\quad -2x^2-4x+3[/tex]
[tex]=2x^2+4x-3-2x^2-4x+3[/tex]
[tex]\mathrm{Simplify}\:2x^2+4x-3-2x^2-4x+3:\quad 0[/tex]
=0
