Question

solution to the equation 8^(y + 3) = 2^y ?
is y= -4.5 correct?

Answer 1

write as
\[\Large 2^{3(y+3)}=2^y\]

Answer 2

answer is either +/- 4.5 or +/-1.5 but 4.5 is wrong and i know it will be on the test

Answer 3

since bases are same just put then equal
\[\Large 3(y+3)=y\]
solve for y

Answer 4

3y+9=y

Answer 5

-9/4

Answer 6

-4.5

Answer 7

ty