Question

Please look at the following simplification of an algebraic expression. Which line contains the mistake and why?

 

Line 1: (2x + 6x) + 4y + 3x - 2xy

Line 2: (8x) + 4y + 3x - 2xy

Line 3: 8x + 3x + 4y - 2xy

Line 4: 11x + 4y - 2xy

Line 5: 13xy

Answer 1

Line 1: (2x + 6x) + 4y + 3x - 2xy

Line 2: (8x) + 4y + 3x - 2xy

Line 3: 8x + 3x + 4y - 2xy

Line 4: 11x + 4y - 2xy

Line 5: 13xy

 

It's all perfectly correct until line 5.

 

11x + 4y - 2xy        ,is as simplified as this equation can get. You cannot simply add all the terms disregarding if they are 'x's, 'y's or 'xy's        

Answer 2

9 • 4 – 3 • 2

Answer 3

w + bn = w + nb

Answer 4

disregard !!!! I am looking for the answer

Answer 5

3x^3-2x^2