How do you combine #(4n ^ { 3} - 4n ^ { 2} - 5n ) + ( 6n ^ { 2} + 5n ^ { 3} - 7n )#?

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Answer 1 · 2018-08-12T01:55:41

#color(maroon)(=> 9n^3 + 2n^2 - 12n#

#(4n^3-4n^2-5n) + (6n^2+5n^3-7n)#

#=> 4n^3 - 4n^2 - 5n + 6n^2 + 5n^3 - 7n, Removing braces.

#=> 4n^3 + 5n^3 - 4n^2 + 6n^2 - 5n - 7 n#, bringing like terms together.

#color(maroon)(=> 9n^3 + 2n^2 - 12n#, combining like terms.

Answer 2 · 2018-08-12T04:23:52

#9n^3+2n^2-12n#

We can start by removing the parenthesis, since they are unnecessary in this case.

Next, we combine the terms with like degrees to get:

#9n^3+2n^2-12n#

Hope this helps!