4(а+2) = 4а+8 2) 3(м-5) = 3м-15 3) (р-q)*9 = 9p -9q 4) 12(a+b) = 12a+ 12b 5) 5(2m-1) = 10m-5 6) (3c+5d)*14 = 42c+ 70d.
4(а+2) = 4а+8 2) 3(м-5) = 3м-15 3) (р-q)*9 = 9p -9q 4) 12(a+b) = 12a+ 12b 5) 5(2m-1) = 10m-5 6) (3c+5d)*14 = 42c+ 70d.