(-8x³ + x) - (-6x + 8 + 4x³) Place a 1 in front of both parentheses: 1(-8x³ + x) - 1(-6x + 8 + 4x³) Remove the parentheses by distributing the 1 and the -1 into the parentheses: -8x³ + 1x + 6x - 8 - 4x³ I'll color the like terms the same color: -8x³ + 1x + 6x - 8 - 4x³ Combine the red terms and the blue terms: -12x³ + 7x - 8 Edwin