Answer:
If the expression is 2y+9x the answer is: 10x+12y
If the expression is 2y-9x the answer is -8x+12y
Step-by-step explanation:
You would combine all your x values:-4,9,9,-4 and that equals 10 then you would add your variable, so your x value is 10x.
You would then combine all your y values: 8,-2,8,-2, and that equals 12, then you would add your variable, so your y value is 12y.
Answer:
x+14y-18xy
Step-by-step explanation:
1) Multiply terms if needed.
2) Group your terms by variables. (x with x, y with y, xy with xy, etc.)
3) Add like terms (terms with same variables)
This problem will look like:
Step one: take the term "-2y9x" and multiply to creat one term (You have to remember PEMDAS with these problems. Look it up if you don't know what it is :) ) You should come up with -18yx for this term.
Step two: Organizing terms ---> 9x-4x-4x+8y+8y-2y-18xy
Step three: Take your like terms and add them together. Your answer should end up being x+14y-18xy
