Question

Solve it please with explanation Marty simplified the expression 2(x - 2) - 2(3) as 2x - 8. Is he correct? Explain why or why not.

Answer 1

• Marty is incorrect.

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.

Answer 2

Answer: Marty is not correct

Explanation:

2(x-2)-2(3) use distributive property

2x-4-6

2x-10

Marty is not correct