How do you combine like terms #(-3y^2-7y-9)-(4y^2+6y+9)#?

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Answer 1 · 2017-01-09T23:52:29

See process for combining like terms below:

First, remove the parenthesis from the terms paying close attention to the sign of each individual term:

#(-3y^2 - 7y - 9) - (4y^2 + 6y + 9) ->#

#-3y^2 - 7y - 9 - 4y^2 - 6y - 9#

Next we will group the like terms together:

#-3y^2 - 4y^2 - 7y - 6y - 9 - 9#

Now we can combine like terms:

#(-3 - 4)y^2 + (-7 - 6)y + (-9 - 9)#

#(-7)y^2 + (-13)y + (-18)#

#-7y^2 - 13y - 18#