[tex]\begin{gathered} (17x^2+7x-14)-(-6x^2-5x-18) \\ \text{Note that the negative sign in front of the parenthesis stands for negative 1} \\ \text{The negative 1 multiplies every term inside the parenthesis and changes their signs respectively} \\ 17x^2+7x-14+6x^2+5x+18 \\ \text{collecting like terms you now have;} \\ 17x^2+6x^2+7x+5x+18-14 \\ 23x^2+12x+4 \end{gathered}[/tex]
