|2a+4|=|3a-8|

解答

∣ 2 a + 4 ∣ = ∣ 3 a - 8 ∣

a = \frac{4}{5} or a = 12

十进制

a = 0.8, a = 12

求解步骤

∣ 2 a + 4 ∣ = ∣ 3 a - 8 ∣

找到正负区间

a < - 2, - 2 \leq a < \frac{8}{3}, a \geq \frac{8}{3}

对每个区间解不等式

无解 or a = \frac{4}{5} or a = 12

a = \frac{4}{5} or a = 12

∣ 4 x + 4 ∣ + 3 > 23

f a c t or 20 x^{2} + 26 x - 6

s im pl i f y \frac{5}{2 5}

f a c t or (x^{4} - 18 x^{2} + 81) (x^{5} + 4 x^{3})

s im pl i f y \frac{1}{1 - \frac{b}{1 - a}}