Respuesta :

wegnerkolmp2741o

Answer:

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

09pqr4sT

Answer:

The answer is 4 (working below), It is not [tex]-4i[/tex] because [tex]i \times i = i^2[/tex].

Step-by-step explanation:

[tex]2i \times -2i[/tex]

Multiply.

[tex]2 \times i \times -2 \times i[/tex]

[tex]-4i^2[/tex]

Apply : [tex]i^2 = -1[/tex]

[tex]-4(-1)[/tex]

[tex]=4[/tex]

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