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Score: \( 1 / 5 \) Finding Zeros with Technology Question Find the zeros of the function \( f(x)=2 x^{2}-23.6 x+67 \). Round values to the nearest thousandths (if necessary). Answer Attempt 1 out of 2 \( \oplus \) Add a Zero \( \Theta \) No Zeros \( x=\square \) Submit Answer

Ask by Crawford Rodriquez. in the United States
Feb 03,2025

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Answer

The zeros of the function \( f(x) = 2x^2 - 23.6x + 67 \) are approximately \( x \approx 4.755 \) and \( x \approx 7.045 \).

Solution

Solve the quadratic equation by following steps: - step0: Solve using the quadratic formula: \(2x^{2}-23.6x+67=0\) - step1: Convert the decimal into a fraction: \(2x^{2}-\frac{118}{5}x+67=0\) - step2: Multiply both sides: \(5\left(2x^{2}-\frac{118}{5}x+67\right)=5\times 0\) - step3: Calculate: \(10x^{2}-118x+335=0\) - step4: Solve using the quadratic formula: \(x=\frac{118\pm \sqrt{\left(-118\right)^{2}-4\times 10\times 335}}{2\times 10}\) - step5: Simplify the expression: \(x=\frac{118\pm \sqrt{\left(-118\right)^{2}-4\times 10\times 335}}{20}\) - step6: Simplify the expression: \(x=\frac{118\pm \sqrt{524}}{20}\) - step7: Simplify the expression: \(x=\frac{118\pm 2\sqrt{131}}{20}\) - step8: Separate into possible cases: \(\begin{align}&x=\frac{118+2\sqrt{131}}{20}\\&x=\frac{118-2\sqrt{131}}{20}\end{align}\) - step9: Simplify the expression: \(\begin{align}&x=\frac{59+\sqrt{131}}{10}\\&x=\frac{118-2\sqrt{131}}{20}\end{align}\) - step10: Simplify the expression: \(\begin{align}&x=\frac{59+\sqrt{131}}{10}\\&x=\frac{59-\sqrt{131}}{10}\end{align}\) - step11: Rewrite: \(x_{1}=\frac{59-\sqrt{131}}{10},x_{2}=\frac{59+\sqrt{131}}{10}\) Calculate or simplify the expression \( (59+\sqrt(131))/10 \). Calculate the value by following steps: - step0: Calculate: \(\frac{\left(59+\sqrt{131}\right)}{10}\) - step1: Remove the parentheses: \(\frac{59+\sqrt{131}}{10}\) Calculate or simplify the expression \( (59-\sqrt(131))/10 \). Calculate the value by following steps: - step0: Calculate: \(\frac{\left(59-\sqrt{131}\right)}{10}\) - step1: Remove the parentheses: \(\frac{59-\sqrt{131}}{10}\) To find the zeros of the function \( f(x) = 2x^2 - 23.6x + 67 \), we need to solve the equation \( 2x^2 - 23.6x + 67 = 0 \). ### Step 1: Identify the coefficients The coefficients of the quadratic equation are: - \( a = 2 \) - \( b = -23.6 \) - \( c = 67 \) ### Step 2: Use the quadratic formula The quadratic formula to find the roots (zeros) of the equation \( ax^2 + bx + c = 0 \) is given by: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] ### Step 3: Calculate the discriminant First, we calculate the discriminant \( D = b^2 - 4ac \): \[ D = (-23.6)^2 - 4 \cdot 2 \cdot 67 \] Calculating this gives: \[ D = 556.96 - 536 = 20.96 \] ### Step 4: Calculate the zeros Now we can find the zeros using the quadratic formula: \[ x_{1} = \frac{23.6 - \sqrt{20.96}}{4} \] \[ x_{2} = \frac{23.6 + \sqrt{20.96}}{4} \] ### Step 5: Evaluate the zeros Calculating these values gives: - For \( x_{1} \): \[ x_{1} \approx 4.755 \] - For \( x_{2} \): \[ x_{2} \approx 7.045 \] ### Final Answer The zeros of the function \( f(x) = 2x^2 - 23.6x + 67 \) are approximately: - \( x \approx 4.755 \) - \( x \approx 7.045 \) You can submit these values as your answer.

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To find the zeros of the function \( f(x) = 2x^2 - 23.6x + 67 \), you can use the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] Here, \( a = 2 \), \( b = -23.6 \), and \( c = 67 \). Plugging these values into the formula will give you the zeros. After calculating, you should find the values for \( x \) rounded to the nearest thousandth, which will help you close in on the roots of the equation. Once you find the zeros using technology like a graphing calculator or an online solver, it can be quite helpful to check your results by substituting the zeros back into the original function to ensure it returns zero. This serves to confirm your calculations, allowing you to build confidence in your problem-solving skills.

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