starrlight48 starrlight48

16-08-2018
Mathematics

contestada

error analysis alana simplified the expression as shown below. do you agree with her work? explain your answer

2(x+4)-(5x-7)

2x+4-5x-7

-3x-3

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Kdiazzle Kdiazzle

16-08-2018

No because she did not distribute the 2 to the 4 and she also didn’t distribute the negative to the seven. It should be
2(x+4)-(5x-7)
2x+8-5x+7
-3x+15

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