Determine the values of the variable that cannot possibly be solutions of each equation. Do not solve. 1/(4x) - 2/x = 3

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Identify the denominators in the equation: the denominators are \$4x$ and $x$.

Recall that division by zero is undefined, so the values of $x$ that make any denominator zero cannot be solutions.

Set each denominator equal to zero and solve for $x$: For $4x = 0$, solve $4x = 0$ which gives $x = 0$; for $x = 0$, it is already clear that $x = 0$ is not allowed.

Conclude that $x = 0$ is the value that cannot possibly be a solution because it makes the denominators zero.

No other values are excluded since these are the only denominators in the equation.

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주요 개념

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

Domain Restrictions in Rational Expressions

Rational expressions involve variables in denominators, which cannot be zero because division by zero is undefined. Identifying values that make any denominator zero is essential to determine which values are excluded from the solution set.

Simplifying Rational Expressions

Before solving or analyzing rational equations, it is important to simplify expressions by finding common denominators or factoring. This helps in clearly identifying restrictions and understanding the structure of the equation.

Non-Solution Values vs. Solutions

Values that make denominators zero are not solutions and must be excluded from the solution set. Distinguishing these from actual solutions ensures correct interpretation of the equation without attempting to solve for invalid values.