Explain the error in the work shown. Find the correct answer.

asked Jan 26, 2018 112k views

1 vote

by Azibi

7.0k points

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2 votes

you cant have a negative exponent

Harshavmb answered Jan 28, 2018

8.2k points

3 votes

The mistake is in 3rd step, as we can't equate powers if bases are different.
4^-3=2^8a
2^-6=2^8a
-6=8a
-3/4=a

Tatham Oddie answered Jan 30, 2018

8.7k points

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