Factor the polynomial completely. 81 space plus space 16 k squared

Factor the polynomial completely.

81 space plus space 16 k squared

A. Prime polynomial

B. left parenthesis 9 space plus space 4 k right parenthesis squared

C. (9 + 4k)(9 – 4k)

D. left parenthesis 9 minus 4 k right parenthesis squared

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