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Solve using the quadratic formula. \( 3 x^{2}+4 x+10=0 \)

Ask by Mitchell Pena. in the United States
Jan 27,2025

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Answer

The equation \(3x^{2}+4x+10=0\) has no real solutions.

Solution

Solve the equation \( 3x^2+4x+10=0 \). Solve the equation(The complex numbers system) by following steps: - step0: Solve using the quadratic formula in the complex numbers system: \(3x^{2}+4x+10=0\) - step1: Solve using the quadratic formula: \(x=\frac{-4\pm \sqrt{4^{2}-4\times 3\times 10}}{2\times 3}\) - step2: Simplify the expression: \(x=\frac{-4\pm \sqrt{4^{2}-4\times 3\times 10}}{6}\) - step3: Simplify the expression: \(x=\frac{-4\pm \sqrt{-104}}{6}\) - step4: Simplify the expression: \(x=\frac{-4\pm 2\sqrt{26}\times i}{6}\) - step5: Separate into possible cases: \(\begin{align}&x=\frac{-4+2\sqrt{26}\times i}{6}\\&x=\frac{-4-2\sqrt{26}\times i}{6}\end{align}\) - step6: Simplify the expression: \(\begin{align}&x=-\frac{2}{3}+\frac{\sqrt{26}}{3}i\\&x=\frac{-4-2\sqrt{26}\times i}{6}\end{align}\) - step7: Simplify the expression: \(\begin{align}&x=-\frac{2}{3}+\frac{\sqrt{26}}{3}i\\&x=-\frac{2}{3}-\frac{\sqrt{26}}{3}i\end{align}\) - step8: Rewrite: \(x_{1}=-\frac{2}{3}-\frac{\sqrt{26}}{3}i,x_{2}=-\frac{2}{3}+\frac{\sqrt{26}}{3}i\) - step9: Remove the complex number(s): \(\textrm{No real solution}\) The quadratic equation \(3x^{2}+4x+10=0\) does not have any real solutions. This means that the equation has no real roots.

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Bonus Knowledge

To solve the quadratic equation \( 3 x^{2}+4 x+10=0 \) using the quadratic formula \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \), we need to identify the coefficients: \( a = 3 \), \( b = 4 \), and \( c = 10 \). Now, calculate the discriminant: \( b^2 - 4ac = 4^2 - 4 \cdot 3 \cdot 10 = 16 - 120 = -104 \). Since the discriminant is negative, this means there are no real solutions, but we can find complex solutions! Now plug the values into the formula: \( x = \frac{-4 \pm \sqrt{-104}}{2 \cdot 3} = \frac{-4 \pm \sqrt{104}i}{6} = \frac{-4 \pm 2\sqrt{26}i}{6} = \frac{-2 \pm \sqrt{26}i}{3} \). Thus, the solutions are: \( x = \frac{-2 + \sqrt{26}i}{3} \) and \( x = \frac{-2 - \sqrt{26}i}{3} \).

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