SOLUTION: Factor polynomial completely please. thank you a^4-ab^3

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Question 193970: Factor polynomial completely please. thank you
a^4-ab^3
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
a^4-ab^3
a (a^3-b^3),,,, difference of cubes
a( a-b) (a^2 + ab +b^2 )
,
check
let a=1, b=2, ok both original and answer give (-7)