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S_A_V [24]
3 years ago
8

What’s the answer???(SOMEONE PLEASE HELP)

Mathematics
2 answers:
Pie3 years ago
6 0

Answer:

= 5

Step-by-step explanation:

i = \sqrt{-1}

-4 - 9*\sqrt{-1}

-4 + 9 * \sqrt{1}

-4 + 9 * 1

-4 + 9

= 5



kakasveta [241]3 years ago
5 0

Answer:

\sqrt{97}

Step-by-step explanation:

|a + bi| = \sqrt{a^2 + b^2}

|-4 - 9i| = \sqrt{(-4)^2 + (-9)^2}

|-4 - 9i| = \sqrt{16 + 81}

|-4 - 9i| = \sqrt{97}

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