Solve each equation. 2x/(x-2) = 5 + 4x2/(x-2)

Ch. 1 - Equations and Inequalities

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Lial 13th Edition

Ch. 1 - Equations and Inequalities

문제 35

2장, 문제 35

Solve each equation. 2x/(x-2) = 5 + 4x²/(x-2)

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Start with the given equation: \(\frac{2x}{x-2} = 5 + \frac{4x^{2}}{x-2}\).

To eliminate the denominators, multiply every term on both sides of the equation by the common denominator \(x-2\) (noting that \(x \neq 2\) to avoid division by zero). This gives: \(2x = 5(x-2) + 4x^{2}\).

Distribute the 5 on the right side: \(2x = 5x - 10 + 4x^{2}\).

Rearrange all terms to one side to set the equation equal to zero: \(0 = 4x^{2} + 5x - 10 - 2x\).

Combine like terms to simplify the quadratic equation: \(0 = 4x^{2} + (5x - 2x) - 10\), which simplifies to \(0 = 4x^{2} + 3x - 10\). From here, you can proceed to solve the quadratic equation using factoring, completing the square, or the quadratic formula.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Rational Equations

Rational equations involve expressions with variables in the denominator. Solving them requires finding a common denominator or eliminating denominators by multiplying both sides, while being careful to exclude values that make any denominator zero.

Domain Restrictions

Domain restrictions are values that make the denominator zero, which are not allowed in the solution set. Identifying these values is crucial before solving to avoid extraneous solutions that do not satisfy the original equation.

Solving Quadratic Equations

After clearing denominators, the equation often reduces to a quadratic form. Solving quadratic equations involves factoring, completing the square, or using the quadratic formula to find the variable's values.