Question
In Exercises $29-44,$ perform the indicated operations and write the result in standard form. $$5 \sqrt{-8}+3 \sqrt{-18}$$
Step 1
We know that $\sqrt{-1} = i$ and $\sqrt{-a} = \sqrt{a}i$ for any positive number $a$. So, we can rewrite the given expression as follows: $$ 5 \sqrt{-8}+3 \sqrt{-18} = 5 \sqrt{8}i + 3 \sqrt{18}i $$ Show more…
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