Question

已知a的绝对值=5,根号下b的平方=3,且ab＞0,则a+b的值为...

Answer 1

| a | = 5

a = 5 或 a = -5

√b² = 3

| b | = 3

b = 3 或 b = -3

因为 ab > 0

所以 a = 5 ,b = 3 或 a = -5 ,b = -3

所以 a + b = 8 或 - 8