Solve each equation. √(x+5) + 2 = √(x-1)

검증된 단계별 안내

Isolate one of the square root expressions to one side of the equation. For example, subtract 2 from both sides to get: \(\sqrt{\!x+5} = \sqrt{\!x-1} - 2\).

Square both sides of the equation to eliminate the square root on the left. This means you will square \(\sqrt{\!x+5}\) and also square \(\sqrt{\!x-1} - 2\) on the right side.

After squaring, simplify both sides carefully. Remember that when you square a binomial like \((a - b)^2\), it expands to \(a^2 - 2ab + b^2\). Apply this to \(\left(\sqrt{\!x-1} - 2\right)^2\).

Once simplified, you will get an equation without square roots. If there is still a square root remaining, isolate it and square both sides again to fully eliminate radicals.

Solve the resulting polynomial equation for \(x\). After finding potential solutions, check each one by substituting back into the original equation to verify they do not produce extraneous solutions.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

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

Square Root Functions and Radicals

Square root functions involve expressions under a radical sign (√). Understanding how to manipulate and isolate these radicals is essential for solving equations that contain square roots, as it allows you to eliminate the radical by squaring both sides.

Isolating the Radical Expression

Before squaring both sides of an equation with radicals, it is important to isolate the radical on one side. This step helps prevent introducing extraneous solutions and simplifies the process of solving the equation.

Checking for Extraneous Solutions

Squaring both sides of an equation can introduce solutions that do not satisfy the original equation. After solving, substitute the solutions back into the original equation to verify which are valid and discard any extraneous ones.