SOLUTION: 5a^-2=1/5 What is a?

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Question 644019: 5a^-2=1/5
What is a?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
5a%5E-2=1%2F5

5%281%2Fa%5E2%29=1%2F5
5%2Fa%5E2=1%2F5......cross multiply
5%2A5=1%2Aa%5E2
25=a%5E2
sqrt%2825%29=a
solutions:
a=5 or a=-5
+graph%28+600%2C+600%2C+-15%2C+15%2C+-10%2C+10%2C+5%281%2Fx%5E2%29-1%2F5%29+