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Mathematics 13 Online
OpenStudy (shesolitt):

i will medal and fan! Simplify the given expression below: (1 + 2i) • (5 − 3i) 2 − 15i 3 + 2i 5 − 6i 11 + 7i

OpenStudy (shesolitt):

i got D

Mehek (mehek14):

Correct

OpenStudy (shadowlegendx):

\[(1 + 2i)(5- 3i)\]

OpenStudy (shadowlegendx):

\[5 -3i + 10i -6i^2 \]

OpenStudy (shadowlegendx):

Like terms \[5 + 7i - 6i^2\]

OpenStudy (shadowlegendx):

Convert -6i^2 -> +6 \[11 + 7i\]

OpenStudy (shadowlegendx):

Remember: \[i^2 = -1\]

OpenStudy (shadowlegendx):

\[-6(-1) = +6\]

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