SOLUTION: USE RULES when possible to simplify: can you help me please? and can you show how you got it. Thanks Thanks 12) (x³-y³) - (-6x³+x²y-xy²+2y³) 13) (3x-y)(2x

Algebra ->  Expressions -> SOLUTION: USE RULES when possible to simplify: can you help me please? and can you show how you got it. Thanks Thanks 12) (x³-y³) - (-6x³+x²y-xy²+2y³) 13) (3x-y)(2x      Log On


   

Question 175437: USE RULES when possible to simplify: can you help me please? and can you show how you got it. Thanks Thanks

12) (x³-y³) - (-6x³+x²y-xy²+2y³)

13) (3x-y)(2x+5y)

14) (7xy²-10y)(7xy²+10y)

15) (xy+ab²)(xy-ab²)

Answer by EMStelley(208) About Me  (Show Source):
You can put this solution on YOUR website!
#13
%283x-y%29%282x%2B5y%29
All that is needed here is foiling
%283x%29%282x%29%2B%283x%29%285y%29%2B%282x%29%28-y%29%2B%285y%29%28-y%29
6x%5E2%2B15xy-2xy-5y%5E2
Now we just combine like terms:
6x%5E2%2B13xy-5y%5E2