Respuesta :

Answer:

B

Step-by-step explanation:

in the expansion of (x+a)^n

(r+1)th  term

[tex]T_{r+1}=ncrx^{n-r}a^r\\r+1=4\\r=4-1=3\\n=6\\T_{4}=6c3 x^{6-3}(-2)^3\\6c3=\frac{6*5*4}{3*2*1} =20\\T_{4}=20x^3(-8)=-160 x^3[/tex]

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