Basics of Square Roots
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(0:01) What is a Square Root (Definition): The square root of a number $x$ is a non-negative value that, when squared, equals $x$ (e.g., $\sqrt{9} = 3$ because $3^2 = 9$).(0:24) Square Root Symbol: The square root symbol always represents a non-negative result. For example, $\sqrt{16} = 4$, not $-4$, even though $(-4)^2 = 16$.(0:54) No Square Roots of Negative Numbers: The square root of a negative number is undefined in real numbers (e.g., $\sqrt{-1}$ is not possible in real numbers).(2:33) Examples of Perfect Squares: Knowing perfect squares like $144 = 12^2$ helps in quickly identifying square roots without calculation.
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