algebra · worked example

Solve x² = 100

Method: 平方根. Verified step-by-step solution with our free AI math solver.
Problem

x2=100x^2 = 100

Step-by-step solution

  1. 両辺の 正と負の両方 の平方根をとります。

  2. x=±100=±10x = \pm\sqrt{100} = \pm 10

  3. 常に両方の符号を含めます — 2乗すると符号の情報が失われるためです。

Answer

x=10orx=10x = 10 \quad \text{or} \quad x = -10

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