How do you evaluate #(- 2j + 9) - ( 7j ^ { 2} + 7j - 6)#?

1 Answer
Mar 7, 2018

See a solution process below:

Explanation:

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

#-2j + 9 - 7j^2 - 7j + 6#

Next, group like terms:

# -7j^2 - 2j - 7j + 9 + 6#

Now, combine like terms:

# -7j^2 + (-2 - 7)j + (9 + 6)#

# -7j^2 + (-9)j + 15#

# -7j^2 - 9j + 15#