Question

If 4^2x-3=512 then x=?

Answer 1

Answer:

4^2x-3=512

2^2(2x-3)=2^9

Therefore 2(2x-3)=9

4x-6=9

4x=9+6

4x=15

x=15/4

x=3.75

Answer 2

Answer:

4^2x-3=512

4^2x-3=2^9

2^4x-6=2^9

Bases are equal on the both sides

4x-6=9

4x=9+6

4x=15

x=15/4

This is your correct answer