Question

Find the roots of the polynomial equation using the quadratic formula: \( 2x^{2} + 3x - 2 = 0 \)

Ask by Flynn Phillips. in South Africa
Jan 23,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The roots are \(x = -2\) and \(x = 0.5\).

Solution

Solve the equation \( 2x^{2}+3x-2=0 \). Solve the quadratic equation by following steps: - step0: Solve by factoring: \(2x^{2}+3x-2=0\) - step1: Factor the expression: \(\left(x+2\right)\left(2x-1\right)=0\) - step2: Separate into possible cases: \(\begin{align}&2x-1=0\\&x+2=0\end{align}\) - step3: Solve the equation: \(\begin{align}&x=\frac{1}{2}\\&x=-2\end{align}\) - step4: Rewrite: \(x_{1}=-2,x_{2}=\frac{1}{2}\) The roots of the polynomial equation \(2x^{2} + 3x - 2 = 0\) using the quadratic formula are \(x_{1} = -2\) and \(x_{2} = 0.5\).

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The Deep Dive

To find the roots of the polynomial equation \( 2x^{2} + 3x - 2 = 0 \), you can use the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] Here, \( a = 2 \), \( b = 3 \), and \( c = -2 \). Plugging in these values, you first calculate the discriminant: \[ b^2 - 4ac = 3^2 - 4 \times 2 \times (-2) = 9 + 16 = 25 \] Now, substitute back into the formula: \[ x = \frac{-3 \pm \sqrt{25}}{2 \times 2} = \frac{-3 \pm 5}{4} \] This gives us two potential solutions: 1. \( x = \frac{-3 + 5}{4} = \frac{2}{4} = \frac{1}{2} \) 2. \( x = \frac{-3 - 5}{4} = \frac{-8}{4} = -2 \) Thus, the roots of the equation \( 2x^{2} + 3x - 2 = 0 \) are \( x = \frac{1}{2} \) and \( x = -2 \). Now you've solved the equation, and you have two special numbers you can throw into your next math conversation to impress your friends!

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