Write the expression in the form bi, where b is a real number.
-$\sqrt { - 81 }$
A) $\pm 9$
B) $- 9 \mathrm { i }$
C) $- \mathrm { i } \sqrt { 9 }$
D) $9 \mathrm { i }$

Name: Write the expression in the form bi, where b is a real number. -$\sqrt { - 81 }$ A) $\pm 9$ B) $- 9 \mathrm { i }$ C) $- \mathrm { i } \sqrt { 9 }$ D) $9 \mathrm { i }$
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Question

Quizplus · Accepted Answer

The square root of -81 can be written as $\sqrt{-1} \times \sqrt{81}$, which simplifies to $9i$ because $\sqrt{-1} = i$ and $\sqrt{81} = 9$.

Write the Expression in the Form Bi, Where B Is −81\sqrt { - 81 }−81​

Write the Expression in the Form Bi, Where B Is $\sqrt { - 81 }$