Zero.
x+y=245 x=0-245 y=0-245
245 = 5 x 7 x 7
1,225
As a product of its prime factors: 5*7*7 = 245
3 x 3 x 3 x 3 = 81
81 x 24 = 1944
81 = 3 x 3 x 3 x 3 or 34
x: x2 - 81 = 0
0
The product is 729
7 x (81 ÷ 9) = 7 x 9 = 63
81 = 3 x 27 = 3 x 3 x 9 = 3 x 3 x 3 x 3