Four unequal integers a, B, C, D, if their product ABCD = 25, then a + B + C + D=

Four unequal integers a, B, C, D, if their product ABCD = 25, then a + B + C + D=

Because ABCD = 25 and a, B, C, D are four unequal integers
So these four numbers are - 5, - 1, 1, 5
So a + B + C + D = 0