Combine the like terms in the expression. drag the item from the item bank to its corresponding match. move to top 11x4 − 13x314x3 − 2x42x4 − 12x35x3 − 6x45x4 − 3x3 −12x4 + 7x3 + 6x4 − 2x3 −5x3 + 7x4 + 4x4 − 8x3 −2x4 − 10x3 + 4x4 − 2x3 15x3 − 15x4 + 13x4 − x3 7x4 − 15x3 + 12x3 − 2x4

They want you to combine the variables. So

−12x4 + 7x3 + 6x4 − 2x3 =

5x3 − 6x4

So you combine the coefficients, not the variable number, for instance -12+6=-6, and then you simply put the variable in the same place it was. You don't do anything else with it except what I just showed you

hope it helps

df =

both have same length