Simplify -i^2

Problem

−i2

Solution

1. Identify the base of the exponent. In the expression −i2 the exponent 2 applies only to the imaginary unit i not to the negative sign.

2. Recall the definition of the imaginary unit i By definition, i2=−1

3. Substitute the value of i2 into the expression.

−(i2)=−(−1)

4. Simplify the signs. The negative of a negative number is positive.

−(−1)=1

Final Answer

−i2=1

Want more problems? Check here!