## Sinz 3 years ago Multiply the expressions, and simplify. (8x3y-3) · (3x3y-3)

1. lilg132

actually i'll let thomas do this one =)

2. Sinz

okay

3. Walleye

do you know how to distribute?

4. Sinz

some what yeah

5. Walleye

this is just a distribution problem but it will take a little longer to compute

6. Sinz

okay help me to start it and I should be able to figure it out I know 8*3 =24

7. Sinz

8. Walleye

sure your first term will be (8x3y * 3x3y)

9. Walleye

let me expand it out for you and then you can try to see the patteren

10. Sinz

okay

11. Walleye

\[(8x3y-3) * (3x3y-3) = (8x3y*3x3y) + (8x3y*-3) + (-3*3x3y) +(-3*-3)\]

12. Walleye

did my eqaution go off the screen for you?

13. Sinz

yeah

14. Walleye

haha sorry the part that is cut off is +(-3 * -3)

15. Walleye

all I did was FOIL it out. Now you have to go about simplying it.

16. Sinz

yeah but what about the exponents the problem was (8x^3y^-3) · (3x^3y^-3) sorry didn't see that when I posted it

17. Sinz

don't you add the exponents when multiplying the main part of the problem

18. Walleye

ah no problem you can slip them into the problem when you mutiply two exponents with the same base you can add the exponents for example \[x^3 * x^5 = x^8\]

19. Sinz

okay so then it is 24x^6y^-6 correct

20. Walleye

yes!!!!

21. Walleye

well done! that one can get messy

22. Sinz

okay thought it was right but wasn't sure thanks again

23. Sinz

yeah especially when it is posted wrong

24. Sinz

I think I have found a new website for tutoring

25. Sinz