a) 9a(5a-4b) = 45a^2 - 36ab
b) -n(p+2n-11) = -np - 2n^2 + 11n
в) (7x+3x-6)*(-1/3x) = -10
г) (4m-11m+8)0,4m = (-7m + 8) 0.4m = -2.8m^2 + 3.2m
a) 9a(5a-4b) = 45a^2 - 36ab
b) -n(p+2n-11) = -np - 2n^2 + 11n
в) (7x+3x-6)*(-1/3x) = -10
г) (4m-11m+8)0,4m = (-7m + 8) 0.4m = -2.8m^2 + 3.2m