oohnoobrie oohnoobrie
  • 26-02-2021
  • Mathematics
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Daniel expanded the expression as shown what errors did he make
-2(-8x-4y+3/4)=10x-8y-1 1/4

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Аноним Аноним
  • 26-02-2021
It’s meant to be +8y not (-) also the last part with the fraction is incorrect.
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NoNameWasGiven
NoNameWasGiven NoNameWasGiven
  • 26-02-2021

Answer:

Step-by-step explanation:

-2(-8x -4y + 3/4)

=> 16x + 8y - 3/2

So what mistakes he made were

1) Daniel added instead of multiplying

  • Daniel did -2 + -8x instead of -2(-8x)

2) When multiplying two negative signs equal a positive

  • -2 * -4y = 8y not -8y

3) For the last number, Daniel added instead of multiplying

  • -2 * 3/4 = 3/2 instead he did 2 + 3/4
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