SOLUTION: Please help me solve this equation: Add (6+3x+9x2+8x3)+ (4-3x+9x2-8x3)

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Question 123644: Please help me solve this equation:
Add
(6+3x+9x2+8x3)+ (4-3x+9x2-8x3)
Found 2 solutions by nadinadan, Earlsdon:
Answer by nadinadan(32) About Me  (Show Source):
You can put this solution on YOUR website!
6+3x+9x^2+8x^3+4-3x+9x^2-8x^3 Group the numbers that have the same constant.
6+4+3x-3x+9x^2+9x^2+8x^3-8x^3 Do yhe opeartions
10+ 18x^2= 2(5+9x^2) Simplify.

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
First, one small correction!
This is not an "equation" but an "expression" because there is no = sign.
In an equation, you would have something on the left side equal to something on the right side.
Ok, Add:
%286%2B3x%2B9x%5E2%2B8x%5E3%29+%2B+%284-3x%2B9x%5E2-8x%5E3%29 First, group the like-term:
%288x%5E3-8x%5E3%29%2B%289x%5E2%2B9x%5E2%29%2B%283x-3x%29%2B%286%2B4%29 Perform the indicated addition/subtraction:
%280%29%2B%2818x%5E2%29%2B%280%29%2B%2810%29 Finally...
18x%5E2%2B10