\[3\imath \times 4\imath \]
1
Simplify.
12ıı12\imath \imath

2
Use Product Rule: xaxb=xa+b{x}^{a}{x}^{b}={x}^{a+b}.
12ı212{\imath }^{2}

3
Use Square Rule: i2=−1{i}^{2}=-1.
12×−112\times -1

4
Simplify.
−12-12

Done
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