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If i² = -1, then (i)(1 + 2)(2-3i)² = ?

If i² = -1, then (i)(1 + 2)(2-3i)² = ?
asked 224k views
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If i² = -1, then (i)(1 + 2)(2-3i)² = ?

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User Callie
by
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1 Answer

3 votes

Answer:


36-15i

Explanation:


(i)(1+2)(2-3i)^2 \\ \\ =3i(2-3i)^2 \\ \\ =3i(9i^2 + 4 -12i) \\ \\ =3i(-9+4-12i) \\ \\ =3i(-5-12i) \\ \\ =-15i-36i^2 \\ \\ =36-15i

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User Trueicecold
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