Why is 2i * -2i equal to 4, and not -4i?

see below

Step-by-step explanation:

2i * -2i = -4 i^2

We know that i^2 = -1

          = -4 * -1

          = 4

It is not equal to -4i because we need to multiply i*i which is i^2 not i

The answer is 4 (working below), It is not because .

Step-by-step explanation:

Multiply.

Apply :

where r the answers

step-by-step explanation:

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i