Add: 3x (x-y+z) and 2y (x+y-z)

Step-by-step explanation:

hello:

3x (x-y+z) + 2y (x+y-z) = 3x²-3xy+3xz + 2yx+2y²-2yz

3x (x-y+z) + 2y (x+y-z) = 3x² - xy+3xz - 2yz+2y²

3x^2 + 3xz + 2y^2 - 2yz - xy

Step-by-step explanation:

(1) multiply it to get

3x^2 - 3xy + 3xz and 2yx + 2y^2 - 2yz

add similar variables (-3xy + 2yx)

(the order of the variables doesn't matter xy or yx is the same)

we get - xy

and then after that simplifying we get 3x^2 + 3xz + 2y^2 - 2yz - xy