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Solve the following inequations. sqrt(...

Solve the following inequations.
`sqrt(-x^(2)+6x-5) gt 8-2x`

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To solve the inequality \( \sqrt{-x^2 + 6x - 5} > 8 - 2x \), we will follow these steps: ### Step 1: Set up the inequality We start with the original inequality: \[ \sqrt{-x^2 + 6x - 5} > 8 - 2x \] ### Step 2: Square both sides To eliminate the square root, we square both sides of the inequality: \[ -x^2 + 6x - 5 > (8 - 2x)^2 \] ### Step 3: Expand the right side Now, we expand the right side: \[ (8 - 2x)^2 = 64 - 32x + 4x^2 \] So the inequality becomes: \[ -x^2 + 6x - 5 > 64 - 32x + 4x^2 \] ### Step 4: Rearrange the inequality Next, we move all terms to one side: \[ -x^2 + 6x - 5 - 64 + 32x - 4x^2 > 0 \] Combining like terms gives us: \[ -5x^2 + 38x - 69 > 0 \] Multiplying through by -1 (and flipping the inequality) gives: \[ 5x^2 - 38x + 69 < 0 \] ### Step 5: Factor the quadratic To factor \( 5x^2 - 38x + 69 \), we can use the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] where \( a = 5, b = -38, c = 69 \). Calculating the discriminant: \[ b^2 - 4ac = (-38)^2 - 4 \cdot 5 \cdot 69 = 1444 - 1380 = 64 \] Now substituting back into the quadratic formula: \[ x = \frac{38 \pm \sqrt{64}}{10} = \frac{38 \pm 8}{10} \] This gives us two solutions: \[ x_1 = \frac{46}{10} = 4.6 \quad \text{and} \quad x_2 = \frac{30}{10} = 3 \] ### Step 6: Determine the intervals The roots divide the number line into intervals. We need to test the sign of the quadratic in each interval: 1. \( (-\infty, 3) \) 2. \( (3, 4.6) \) 3. \( (4.6, \infty) \) ### Step 7: Test the intervals - For \( x < 3 \) (e.g., \( x = 0 \)): \[ 5(0)^2 - 38(0) + 69 = 69 > 0 \] - For \( 3 < x < 4.6 \) (e.g., \( x = 4 \)): \[ 5(4)^2 - 38(4) + 69 = 80 - 152 + 69 = -3 < 0 \] - For \( x > 4.6 \) (e.g., \( x = 5 \)): \[ 5(5)^2 - 38(5) + 69 = 125 - 190 + 69 = 4 > 0 \] ### Step 8: Conclusion The quadratic \( 5x^2 - 38x + 69 < 0 \) is satisfied in the interval: \[ (3, 4.6) \] ### Final Answer Thus, the solution to the inequality is: \[ x \in (3, 4.6) \]
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