Solve each equation. 3-√x=√(2(√x)-3)

검증된 단계별 안내

Start by isolating the square root expressions on each side of the equation: \(3 - \sqrt{x} = \sqrt{2\sqrt{x} - 3}\).

To eliminate the square roots, square both sides of the equation carefully: \(\left(3 - \sqrt{x}\right)^2 = \left(\sqrt{2\sqrt{x} - 3}\right)^2\).

Expand the left side using the formula \((a - b)^2 = a^2 - 2ab + b^2\): \(9 - 6\sqrt{x} + x = 2\sqrt{x} - 3\).

Rearrange the equation to isolate the remaining square root term: \(9 + x + 3 = 2\sqrt{x} + 6\sqrt{x}\), which simplifies to \(x + 12 = 8\sqrt{x}\).

Square both sides again to remove the square root: \((x + 12)^2 = (8\sqrt{x})^2\), then expand and simplify to form a polynomial equation in terms of \(x\).

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주요 개념

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

Square Roots and Radicals

Square roots represent a value that, when multiplied by itself, gives the original number. Understanding how to manipulate and simplify expressions involving square roots is essential, especially when they appear nested or combined with other terms.

Isolating Radicals and Squaring Both Sides

To solve equations with radicals, isolate the radical expression on one side and then square both sides to eliminate the square root. This process may need to be repeated if multiple radicals are present, but care must be taken to check for extraneous solutions.

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.