а) 99^2 = (100 - 1)^2 = 100^2 - 2 100 1 + 1 = 10000 - 200 + 1 = 9801б) 202^2 = (200 + 2)^2 = 200^2 + 2 200 2 + 2^2 = 40000 + 800 + 4 = 40904
а) 99^2 = (100 - 1)^2 = 100^2 - 2 100 1 + 1 = 10000 - 200 + 1 = 9801
б) 202^2 = (200 + 2)^2 = 200^2 + 2 200 2 + 2^2 = 40000 + 800 + 4 = 40904