PixelZombie
New member
- Joined
- Feb 6, 2009
- Messages
- 6
i am using the foil method and i know my answers wrong
[5+(x-y)][5-(x-y)]
here's what I got
25-5x-5y+5x-5y-(x-y)(x-y) i think i didn't something wrong here
25-10y-(x-y)(x-y)
25-10y-x^-xy-xy+y^
25-10y-x^+xy^+y^ do you add 10y to y^ and if so then 10y+y^=10 cubed?
sorry to ask so many questions, I don't have my algebra book yet.
[5+(x-y)][5-(x-y)]
here's what I got
25-5x-5y+5x-5y-(x-y)(x-y) i think i didn't something wrong here
25-10y-(x-y)(x-y)
25-10y-x^-xy-xy+y^
25-10y-x^+xy^+y^ do you add 10y to y^ and if so then 10y+y^=10 cubed?
sorry to ask so many questions, I don't have my algebra book yet.