Question

(-3i)(10i)

Exponents and radicals
ANSWERED
asked 2020-11-08
\(\displaystyle{\left(-{3}{i}\right)}{\left({10}{i}\right)}\)

Answers (1)

2020-11-09

We are given:
\((−3i)(10i)\)
Multiply the numbers as usual and the imaginary unit by adding the exponents:
\(=-30i2\)
Recall that \(i=\sqrt{-1}\ so\ i2=-1\)
\(=-30(-1)\)
\(=30\)

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