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Which expression is equivalent to this polynomial?

9x^2 + 4


A. (3x + 2i)(3x − 2i)

B. (3x + 2)(3x − 2)

C. (3x + 2i)^2

D. (3x + 2)^2


Answer: A. (3x + 2i)(3x − 2i)


I hope this helps.

Respuesta :

MichaelNora

Answer:

A is the answer.

Step-by-step explanation:

In the first, we must know i^2 is (-1)

so we can get the answer is A.

A.(3x + 2i)(3x − 2i)

= (3x)^2 - (2i)^2

= 9x^2 + 4 (Answer)

B. (3x + 2)(3x − 2) = 9x^2 - 4

C. (3x + 2i)^2

= 9x^2 + 12ix - 4

D. (3x + 2)^2

= 9x^2 + 12x + 4

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