Solve each equation using the quadratic formula. (2/3)x² + (1/4)x = 3

검증된 단계별 안내

Rewrite the given equation in standard quadratic form \(a x^2 + b x + c = 0\). Start by moving all terms to one side: \(\frac{2}{3}x^2 + \frac{1}{4}x - 3 = 0\).

Identify the coefficients \(a\), \(b\), and \(c\) from the quadratic equation: \(a = \frac{2}{3}\), \(b = \frac{1}{4}\), and \(c = -3\).

Write down the quadratic formula: \(x = \frac{-b \pm \sqrt{b^2 - 4 a c}}{2 a}\).

Substitute the values of \(a\), \(b\), and \(c\) into the quadratic formula: \(x = \frac{-\frac{1}{4} \pm \sqrt{\left(\frac{1}{4}\right)^2 - 4 \cdot \frac{2}{3} \cdot (-3)}}{2 \cdot \frac{2}{3}}\).

Simplify the expression under the square root (the discriminant) and the denominator step-by-step to prepare for solving for \(x\).

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주요 개념

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Quadratic Equation Standard Form

A quadratic equation is typically written in the form ax² + bx + c = 0, where a, b, and c are constants and a ≠ 0. To use the quadratic formula, the equation must first be rearranged into this standard form by moving all terms to one side.

Quadratic Formula

The quadratic formula x = (-b ± √(b² - 4ac)) / (2a) provides the solutions to any quadratic equation ax² + bx + c = 0. It uses the coefficients a, b, and c to find the roots, including real and complex solutions.

Simplifying Fractions and Radicals

When coefficients are fractions, it is important to carefully handle arithmetic operations, including finding common denominators and simplifying radicals under the square root. Accurate simplification ensures correct solutions when applying the quadratic formula.

Solve each equation using the quadratic formula. (2/3)x2 + (1/4)x = 3