Question

21^-9x=e^2x
solve with exact answers

Answer 1

take log on both sides./........

Answer 2

just spontaneous, from looking at it, x=0 should be a solution.

Answer 3

I came up with x=0

Answer 4

\[ \large a^0 = 1 \ \forall \ a \in \mathbb{R}
\\ \large a\neq 0 \]