We need to solve the inequality $\frac{(x+2)|x-3|}{x^2+6} > -1$.

AlgebraInequalitiesAbsolute ValueCase Analysis
2025/5/25

1. Problem Description

We need to solve the inequality (x+2)x3x2+6>1\frac{(x+2)|x-3|}{x^2+6} > -1.

2. Solution Steps

First, we multiply both sides of the inequality by x2+6x^2+6. Since x2+6>0x^2+6 > 0 for all real xx, the inequality sign does not change.
(x+2)x3>(x2+6)(x+2)|x-3| > -(x^2+6)
(x+2)x3>x26(x+2)|x-3| > -x^2-6
(x+2)x3+x2+6>0(x+2)|x-3| + x^2 + 6 > 0
We consider two cases:
Case 1: x3x \geq 3. In this case, x3=x3|x-3| = x-3, so the inequality becomes:
(x+2)(x3)+x2+6>0(x+2)(x-3) + x^2 + 6 > 0
x2x6+x2+6>0x^2 - x - 6 + x^2 + 6 > 0
2x2x>02x^2 - x > 0
x(2x1)>0x(2x-1) > 0
This implies either x>0x > 0 and 2x1>02x-1 > 0, or x<0x < 0 and 2x1<02x-1 < 0.
x>0x > 0 and x>12x > \frac{1}{2}, which means x>12x > \frac{1}{2}.
x<0x < 0 and x<12x < \frac{1}{2}, which means x<0x < 0.
So x<0x < 0 or x>12x > \frac{1}{2}.
Since we assumed x3x \geq 3, the solution in this case is x3x \geq 3.
Case 2: x<3x < 3. In this case, x3=(x3)=3x|x-3| = -(x-3) = 3-x, so the inequality becomes:
(x+2)(3x)+x2+6>0(x+2)(3-x) + x^2 + 6 > 0
3xx2+62x+x2+6>03x - x^2 + 6 - 2x + x^2 + 6 > 0
x+12>0x + 12 > 0
x>12x > -12
Since we assumed x<3x < 3, the solution in this case is 12<x<3-12 < x < 3.
Combining both cases:
x3x \geq 3 or 12<x<3-12 < x < 3, which means x>12x > -12.
Therefore, the solution to the inequality is x>12x > -12.

3. Final Answer

x>12x > -12

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