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受欢迎的代数 >

|(3x-5)(x+2)|=4

解答

∣ (3 x - 5) (x + 2) ∣ = 4

解答

x = - \frac{7}{3} or x = \frac{- 1 - 73}{6} or x = \frac{- 1 + 73}{6} or x = 2

+1

十进制

x = - 2.33333 \dots, x = - 1.59066 \dots, x = 1.25733 \dots, x = 2

求解步骤

∣ (3 x - 5) (x + 2) ∣ = 4

使用绝对值运算法则: 若

∣ u ∣ = a, a > 0

，则

u = a

or

u = - a

(3 x - 5) (x + 2) = - 4 or (3 x - 5) (x + 2) = 4

(3 x - 5) (x + 2) = - 4 or (3 x - 5) (x + 2) = 4

(x = \frac{- 1 - 73}{6} or x = \frac{- 1 + 73}{6}) or (x = - \frac{7}{3} or x = 2)

x = - \frac{7}{3} or x = \frac{- 1 - 73}{6} or x = \frac{- 1 + 73}{6} or x = 2

作图

流行的例子

0 = ∣ z - 5 ∣

- 4 ∣ 9 + x ∣ = - 40

0 = 3 - ∣ x + 4 ∣

ln(ln(y))=-ln|x|

ln (ln (y)) = - ln ∣ x ∣

∣ - 5 n ∣ - 3 = 12