If AB > 0, then the value of | a | a + | B | B − | ab | AB is equal to______ ． | Math enthusiast | Mathematical art

If AB > 0, then the value of | a | a + | B | B − | ab | AB is equal to______ ．

When a ＞ 0, B ＞ 0, the original formula = 1 + 1-1 = 1; when a ＜ 0, B ＜ 0, the original formula = - 1-1-1 = - 3

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