How do you combine like terms in #(2z^2-4)-(z^2-4)-(3z^2-2)#?

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Answer 1 · 2017-01-28T17:38:42

See the complete solution process below:

First, expand the terms in parenthesis:

#2z^2 - 4 - z^2 + 4 - 3z^2 + 2#

Next, group like terms:

#2z^2 - z^2 - 3z^2 - 4 + 4 + 2#

Now, combine like terms:

#(2 - 1 - 3)z^2 + (-4 + 4 + 2)#

#-2z^2 + 2#