Respuesta :
Answer:
-32x^2 - 48x - 10
Step-by-step explanation:
You have to distribute -8x to (5+4x) and -2 to (5+4x)
Here is how it's done.
-8x(5+4x) - 2(5+4x)
-40x - 32x^2 - 10 - 8x
Now combine the like term:
-32x^2 - 40x - 8x - 10
-32x^2 - 48x - 10