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−4.2x+3 and 2.5x−6

add the two expressions

Guest Mar 2, 2017
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Take like terms into consideration and this'll be a breeze: 

 

-4.2x and 2.5x are like terms so add them together to get -1.7x

 

3 and -6 are like terms so add those together as well to obtain -3

 

Now you're left with:

 

-1.7x - 3

HighSchoolCalculus  Mar 2, 2017

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