## Elementary Algebra

-9$x^{2}$ + 8x - 20
3(2$x^{2}$ - 4x - 5) - 5(3$x^{2}$ - 4x + 1) = Use the distributive property to remove round brackets. 6$x^{2}$ - 12x - 15 - 15$x^{2}$ + 20x - 5 = Group similar terms. (6$x^{2}$ - 15$x^{2}$) + (-12x + 20x) + (-15 - 5) = Simplify. -9$x^{2}$ + 8x - 20