1) (-c-3)x(c+1) = -c(c+1) - 3(c+1) = -c^2 - c - 3c - 3 = -c^2 - 4c - 3
2) (11a-4) x (3-2a) = 11a(3) - 11a(2a) - 4(3) - 4(-2a) = 33a - 22a^2 - 12 + 8a = -22a^2 + 41a - 12
3) -0,8k x ( k + 5)-0,6 x (10k-3) = -0.8k^2 - 4k - 0.6(10k) + 1.8 = -0.8k^2 - 4k - 6k + 1.8 = -0.8k^2 - 10k + 1.8
1) (-c-3)x(c+1) = -c(c+1) - 3(c+1) = -c^2 - c - 3c - 3 = -c^2 - 4c - 3
2) (11a-4) x (3-2a) = 11a(3) - 11a(2a) - 4(3) - 4(-2a) = 33a - 22a^2 - 12 + 8a = -22a^2 + 41a - 12
3) -0,8k x ( k + 5)-0,6 x (10k-3) = -0.8k^2 - 4k - 0.6(10k) + 1.8 = -0.8k^2 - 4k - 6k + 1.8 = -0.8k^2 - 10k + 1.8