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Ive the quadratic equation. \( -9 x^{2}-2 x+3=0 \) Vrite one exact solution in each box. You can add or remove boxes. If there are no olutions, remove all boxes.

Ask by Ellis Stuart. in the United States
Mar 19,2025

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Answer

The solutions are \( x_{1}=-\frac{1+2\sqrt{7}}{9} \) and \( x_{2}=\frac{-1+2\sqrt{7}}{9} \).

Solution

Solve the equation \( -9x^2-2x+3=0 \). Solve the quadratic equation by following steps: - step0: Solve using the quadratic formula: \(-9x^{2}-2x+3=0\) - step1: Multiply both sides: \(9x^{2}+2x-3=0\) - step2: Solve using the quadratic formula: \(x=\frac{-2\pm \sqrt{2^{2}-4\times 9\left(-3\right)}}{2\times 9}\) - step3: Simplify the expression: \(x=\frac{-2\pm \sqrt{2^{2}-4\times 9\left(-3\right)}}{18}\) - step4: Simplify the expression: \(x=\frac{-2\pm \sqrt{112}}{18}\) - step5: Simplify the expression: \(x=\frac{-2\pm 4\sqrt{7}}{18}\) - step6: Separate into possible cases: \(\begin{align}&x=\frac{-2+4\sqrt{7}}{18}\\&x=\frac{-2-4\sqrt{7}}{18}\end{align}\) - step7: Simplify the expression: \(\begin{align}&x=\frac{-1+2\sqrt{7}}{9}\\&x=\frac{-2-4\sqrt{7}}{18}\end{align}\) - step8: Simplify the expression: \(\begin{align}&x=\frac{-1+2\sqrt{7}}{9}\\&x=-\frac{1+2\sqrt{7}}{9}\end{align}\) - step9: Rewrite: \(x_{1}=-\frac{1+2\sqrt{7}}{9},x_{2}=\frac{-1+2\sqrt{7}}{9}\) The solutions to the quadratic equation \( -9x^{2}-2x+3=0 \) are: \( x_{1}=-\frac{1+2\sqrt{7}}{9} \) \( x_{2}=\frac{-1+2\sqrt{7}}{9} \)

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To solve the quadratic equation \(-9x^2 - 2x + 3 = 0\), we can apply the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] Here, \(a = -9\), \(b = -2\), and \(c = 3\). Plugging in these values: \[ b^2 - 4ac = (-2)^2 - 4(-9)(3) = 4 + 108 = 112 \] Now substituting back into the formula: \[ x = \frac{-(-2) \pm \sqrt{112}}{2(-9)} = \frac{2 \pm \sqrt{112}}{-18} \] Since \(\sqrt{112} = 4\sqrt{7}\), we have: \[ x = \frac{2 \pm 4\sqrt{7}}{-18} \] This simplifies to: \[ x = \frac{-1 \pm 2\sqrt{7}}{9} \] Thus, the two exact solutions are: \[ x = \frac{-1 + 2\sqrt{7}}{9} \] \[ x = \frac{-1 - 2\sqrt{7}}{9} \]

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