# Algebra (Check My Work)

(7a)^-2

1/(7a^2)

1/49a^2

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1. 1/(7a)^2 = 1/(49a^2)

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posted by Damon
2. Do I need parentheses on the whole thing in the last step?

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3. Only if typing
If you are writing then you can do

1
-------
49 a^2

however 1/49a^2
could be
(1/49)a^2
so parentheses are important when doing fractions with keyboard

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posted by Damon

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