Which expression is equivalent to 4 6i²?

The expression 4 6i² can be simplified using the property of imaginary numbers. Specifically, we know that i² = -1.

So, let’s break it down:

• First, we can rewrite the expression as 4 + 6i².
• Now, substituting i² with -1 gives us: 4 + 6(-1).
• This simplifies to: 4 – 6.
• Finally, performing the arithmetic results in: -2.

Thus, the expression equivalent to 4 6i² is -2.