SOLUTION: 3x^4-81xy^3 i need help on how to work it out
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Question 348704: 3x^4-81xy^3 i need help on how to work it out
Found 2 solutions by ewatrrr, vleith:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Hi,
If I am understanding your question properly, the idea is to simplify by factoring out what each term has in common. In this case both terms have 3*x in common:
.
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
The terms on the right are a difference of 2 cubes
Use this formula to solve
http://www.purplemath.com/modules/specfact2.htm
Here is the solution
http://www.wolframalpha.com/input/?i=3x^4-81xy^3