3 years ago

Express the radical using the imaginary unit, i. ± -81 =±

Mathematics

2 answers:

Alexus [3.1K]3 years ago

4 0

Step-by-step explanation:

Step 1: Find the radical

$\pm\sqrt{-81}$

$\pm(\sqrt{-1} * \sqrt{81})$

$\pm i*9$

$\pm 9i$

Answer: $\pm 9i$

Tresset [83]3 years ago

3 0

Answer:

+/- 9i

Step-by-step explanation:

+/- sqrt(-81) = +/- sqrt(-1) × sqrt(81)

= +/- 9i

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