## Elementary Algebra

3$x^{2}$ + 2x - 9
(2$x^{2}$ + 3x - 4) + (4$x^{2}$ - 3x - 6) - (3$x^{2}$ - 2x - 1) = Use the distributive property. 2$x^{2}$ + 3x - 4 + 4$x^{2}$ - 3x - 6 - 3$x^{2}$ + 2x + 1 = Group similar terms. (2$x^{2}$ + 4$x^{2}$ - 3$x^{2}$) + (3x - 3x + 2x) + (-4 - 6 + 1) = Simplify. 3$x^{2}$ + 2x - 9