College Algebra / Alg 203 · Atom · ~20 seconds
The Square Root Property
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The square root property states that x² = k has two solutions, x = √k and x = −√k, written x = ±√k.
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x² = 9 gives x = ±3: 3² and (−3)² land on 9. The radical names one root; the equation owns two.
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The ± belongs to the equation, not to the radical.
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