Answer :

we have the next squared binomial

[tex](m+4)^2[/tex]

we have the next formula in order to expand a squared binomial

[tex](a+b)^2=a^2+2ab+b^2[/tex]

So we can expand

[tex](m+4)^2=m^2+2(4)(m)+4^2=m^2+8m+16[/tex]

so the correct answer is the first one

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