а) (m-n)(x+c) = mx+mc-nx-nc
в) (a+3)(a-2) = a²-2a+3a-6 = a²+a-6
д) (1-2a)(3a+1) = 3a+1-6a²-2a = -6a²+a+1
б) (k-p)(k-n) = k²-kn-pk-pn
г) (5-x)(4-x) = 20-5x-4x+x² = 20-9x+x²
е) (6m-3)(2-5m) = 12m-30m²-6+15m = 27m-30m²-6
а) (m-n)(x+c) = mx+mc-nx-nc
в) (a+3)(a-2) = a²-2a+3a-6 = a²+a-6
д) (1-2a)(3a+1) = 3a+1-6a²-2a = -6a²+a+1
б) (k-p)(k-n) = k²-kn-pk-pn
г) (5-x)(4-x) = 20-5x-4x+x² = 20-9x+x²
е) (6m-3)(2-5m) = 12m-30m²-6+15m = 27m-30m²-6