|x^2-6x|=9

解

x^{2} - 6 x = 9

x = 3 (1 - 2) or x = 3 or x = 3 (1 + 2)

十進法表記

x = - 1.24264 \dots, x = 3, x = 7.24264 \dots

解答ステップ

x^{2} - 6 x = 9

絶対規則を適用する:

∣ u ∣ = a, a > 0

の場合は

u = a

u = - a

x^{2} - 6 x = - 9 or x^{2} - 6 x = 9

x^{2} - 6 x = - 9 or x^{2} - 6 x = 9

x = 3 or (x = 3 (1 - 2) or x = 3 (1 + 2))

x = 3 (1 - 2) or x = 3 or x = 3 (1 + 2)