How do you simplify #(- 8r ^ { 2} - r - 1) + ( - 8r ^ { 2} - 7r )#?

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Answer 1 · 2018-06-19T12:19:16

See a solution process below:

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

#-8r^2 - r - 1 - 8r^2 - 7r#

Next, group like terms:

#-8r^2 - 8r^2 - r - 7r - 1#

Now, combine like terms:

#-8r^2 - 8r^2 - r - 7r - 1#

#-8r^2 - 8r^2 - 1r - 7r - 1#

#(-8 - 8)r^2 + (-1 - 7)r - 1#

#-16r^2 + (-8)r - 1#

#-16r^2 - 8r - 1#