Question

me pueden ayudar......

Answer 1

${6}^{2} = 36 = (3 + 6) = 9 = 9(1) \\ {66}^{2} = 4356 = (4 + 3 + 5 + 6) = 18 = 9(2)\\ {66...6}^{2} =..... = x = 9(50) = 450$