- $\sqrt{\-21}$

asked by guest
on Nov 28, 2024 at 12:44 am



You asked:

Evaluate the expression: −−21-\sqrt{-21}

MathBot Answer:

−−21=−21i-\sqrt{-21} = - \sqrt{21} i

−−21=−−21=−i⋅21=−⋅i⋅21\begin{aligned}-\sqrt{-21}&=- \sqrt{-21}\\&=- i \cdot \sqrt{21}\\&=- \cdot i \cdot \sqrt{21}\end{aligned}

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