0.25x^3+x^2-3.1x-4.4=0.5|x|-2.7

解

0.25 x^{3} + x^{2} - 3.1 x - 4.4 = 0.5 ∣ x ∣ - 2.7

x = - 5.63216 \dots or x = - 0.55261 \dots or x = 2.58581 \dots

解答ステップ

0.25 x^{3} + x^{2} - 3.1 x - 4.4 = 0.5 ∣ x ∣ - 2.7

正と負の区間を求める

x < 0, x \geq 0

各区間の不等式を解く

(x = - 5.63216 \dots or x = - 0.55261 \dots) or x = 2.58581 \dots

x = - 5.63216 \dots or x = - 0.55261 \dots or x = 2.58581 \dots