SOLUTION: Factor each of the following completely.
x^4-81y^4
Algebra.Com
Question 789207: Factor each of the following completely.
x^4-81y^4
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Apply the difference of squares rule (twice) to get
x^4-81y^4
(x^2)^2-(9y^2)^2
(x^2-9y^2)(x^2+9y^2)
(x^2-(3y)^2)(x^2+9y^2)
(x-3y)(x+3y)(x^2+9y^2)
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