176k views
21 votes
5 power 2x = 1/125. find the value of x.​

User Doink
by
6.3k points

1 Answer

10 votes

Answer:

x = -3/2

Explanation:

note: 1/125 can be written as 5 exponent -3 thus, 5^-3

Expressing it in this form, we can rewrite the above equation as

5^2x = 5^-3

As part of the laws of indices and logarithms, when the bases are the same and they are equating, You equate only the exponents

therefore, we have;

2x = -3

divide through by 2

x = -3/2

User Axelduch
by
5.8k points