|d+3|=0

解答

∣ d + 3 ∣ = 0

d = - 3

求解步骤

∣ d + 3 ∣ = 0

使用绝对值运算法则: 若

∣ u ∣ = 0

，则

u = 0

d + 3 = 0

d + 3 = 0 : d = - 3

d = - 3

∣ 3 x - 9 ∣ + 5 = 5

- ∣ 2 (x + 5) (x - 5) ∣ - 3 = 53

- 9 = - 8 ∣ - s - 1000 ∣ - 9

so l v e f or t, ∣ 1 - 4 t ∣ = 5

- ∣ 10 + x ∣ + 10 = - ∣