How do you combine like terms in #(- 6r ^ { 2} + 5r + 1) - ( - 6r + 9)#?

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Answer 1 · 2017-05-02T13:52:59

See the entire solution process below:

First, remove all of the terms from parenthesis. Be careful to handle the signs of each individual term correctly:

#-6r^2 + 5r + 1 + 6r - 9#

Next, group like terms:

#-6r^2 + 5r + 6r + 1 - 9#

Now, combine like terms:

#-6r^2 + (5 + 6)r + (1 - 9)#

#-6r^2 + 11r + (-8)#

#-6r^2 + 11r - 8#