Respuesta :

Answer:

  • Marty is incorrect.

Step-by-step explanation:

Let's check his work by simplifying the given expression.

  • 2(x - 2) - 2(3)
  • => 2x - 4 - 6
  • => 2x - 10

When I compare Marty's result and this result, they are un-equal. Hence, Marty is incorrect.

Marty's mistake

  • Marty must've got the problem wrong because of not understanding the distributive property.
  • He probably forgot to multiply -2 by 2. Instead, he only subtracted 2 when he should've subtracted 4 from 2x.

No wrong

This is because of distributive law

  • a(b-b)=ab-ac

Lets see

[tex]\\ \rm\hookrightarrow 2(x-2)-2(3)[/tex]

[tex]\\ \rm\hookrightarrow 2x-4-8[/tex]

[tex]\\ \rm\hookrightarrow 2x-12[/tex]