Essay

Recalling Properties of Principal Square Roots

In a technical training workshop, a colleague is attempting to solve the equation 9k2+1=0\sqrt{9k - 2} + 1 = 0. After the first step, your colleague correctly arrives at the isolated form: 9k2=1\sqrt{9k - 2} = -1. Write a brief response explaining the mathematical rule regarding principal square roots that allows your colleague to conclude there is no real solution for kk. In your explanation, clarify why it is unnecessary to continue with further algebraic steps like squaring both sides.

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Updated 2026-04-19

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