a) -6(x-2) + 4(x+2) = -6x + 12 + 4x + 8 = -2x + 20
b) (3a - 96) * (2a - 4b) = 3a*2 - 3a*4b - 96*2a - 96*(-4b) = [tex]6a^2[/tex] - 12ab - 192a + 384b
c) (3t+1) * (2-2t) = 3t*2 - 3t*2t + 1*2 - 1*2t = 6t - [tex]6t^2[/tex] + 2 -2t = 4t - [tex]6t^2[/tex] + 2 = [tex]-6t^2[/tex] + 4t + 2
