Respuesta :

B is the correct answer!

Answer:

B

Step-by-step explanation:

the gcf of 42 is 1,2,3,6,7,21,42

then we find the number when we add give 13 is 6and 7

x^2+13x+42

x^2+6x+7x+42

x(x+6)+7(x+6)

(x+6)(x+7)

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