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

User Minkyu
by
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2 Answers

3 votes

Answer:

  • 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.
User Ritzk
by
7.9k points
5 votes


\\ \sf\longmapsto 2(x-2)-2(3)

  • a(b-c)=ab-ac


\\ \sf\longmapsto 2x-2(2)-6


\\ \sf\longmapsto 2x-4-6


\\ \sf\longmapsto 2x-10

Marty was wrong in opening brackets

User Swapnil Jariwala
by
7.8k points

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