Respuesta :

ache67

Step-by-step explanation:

here u go.

hope it helps you

Ver imagen ache67
SophieSargsyan

Answer:

-10

Step-by-step explanation:

5ab-4bc+8ab+9=

1) 5ab+8ab=13ab

2) 13ab-4bc=b(13a-4c)

3) b(13a-4c)+9= (-1)( 13×3-4×5)+9= -19+9= -10