Question

Simplify i2. 1) 12) i3) -i4) -1

Answer 1

we are to simplify i^2

firstly, one thing we must bear in mind is that performing operations on complex numbers requires multiplying by i and simplifying poers of i.

so by defintion, i = the square root of -1,

so i^2 = -1

therefore, the correct option is the fourth option which is -1