SOLUTION: I need to factor this problem, i am having a hard ime: a^5-625a

Question 314468: I need to factor this problem, i am having a hard ime: a^5-625a
Found 2 solutions by nerdybill, malaydassharma:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
a^5-625a
a(a^4-625)
Look for "difference of squares"
a((a^2)^2-(25)^2)
a(a^2+25)(a^2-25)
a(a^2+25)(a+5)(a-5)

Answer by malaydassharma(59) (Show Source): You can put this solution on YOUR website!
a^5-625a
=a(a^4-5^4)
=a[ (a^2)^2 - (5^2)^2 ]
=a[ (a^2+ 5^2)(a^2- 5^2)]
=a(a^2+ 25)(a+5)(a-5)
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