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Question 10 Solve for \( x: 6 x^{2}-5 x-4=0 \) Important: Be sure to submit in order from least to greatest! \( x= \) Blank 1 \( x= \) Blank 2

Ask by Dawson Elliott. in the United States
Mar 10,2025

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Answer

\( x = -\frac{1}{2} \) \( x = \frac{4}{3} \)

Solution

**Step 1: Write Down the Equation** We start with the quadratic equation \[ 6x^2 - 5x - 4 = 0. \] **Step 2: Identify the Coefficients** The coefficients are: \[ a = 6, \quad b = -5, \quad c = -4. \] **Step 3: Apply the Quadratic Formula** The quadratic formula is \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}. \] Substitute the coefficients into the formula: \[ x = \frac{-(-5) \pm \sqrt{(-5)^2 - 4(6)(-4)}}{2(6)}. \] **Step 4: Simplify the Expression** Simplify the numerator and the discriminant: \[ x = \frac{5 \pm \sqrt{25 + 96}}{12}. \] \[ x = \frac{5 \pm \sqrt{121}}{12}. \] **Step 5: Compute the Square Root** Since \(\sqrt{121} = 11\), the expression becomes: \[ x = \frac{5 \pm 11}{12}. \] **Step 6: Find the Two Solutions** Calculate each solution separately: For the negative branch: \[ x = \frac{5 - 11}{12} = \frac{-6}{12} = -\frac{1}{2}. \] For the positive branch: \[ x = \frac{5 + 11}{12} = \frac{16}{12} = \frac{4}{3}. \] **Step 7: Write the Final Answers in Order (Least to Greatest)** Blank 1: \[ x = -\frac{1}{2} \] Blank 2: \[ x = \frac{4}{3} \]

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To solve the quadratic equation \( 6x^2 - 5x - 4 = 0 \), we can use the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] Here, \( a = 6 \), \( b = -5 \), and \( c = -4 \). Plugging these values into the formula gives us: \[ x = \frac{5 \pm \sqrt{(-5)^2 - 4 \cdot 6 \cdot (-4)}}{2 \cdot 6} \] Calculating: 1. \( (-5)^2 = 25 \) 2. \( 4 \cdot 6 \cdot (-4) = -96 \) so, \( 25 - (-96) = 25 + 96 = 121 \) 3. Now, \( \sqrt{121} = 11 \) Thus, we have: \[ x = \frac{5 \pm 11}{12} \] Now, let’s calculate the two possible values for \( x \): 1. \( x = \frac{5 + 11}{12} = \frac{16}{12} = \frac{4}{3} \) 2. \( x = \frac{5 - 11}{12} = \frac{-6}{12} = -\frac{1}{2} \) Arranging in order from least to greatest, we have: \( x = -\frac{1}{2} \) \( x = \frac{4}{3} \)

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