10a 5a 20 ))= 5 3a 4 July 8, 2019 16 32 64 128 3a - (10 + 5a) = 54 1) 5a ^ 2 - 15a ^ 4 + 10a ^ 6 5) 4(a - 3) + a(3 - a) 3) a(x + y) - b(x + y)