Algebra-2

Question Analysis
This problem assesses the ability to solve exponential equations using substitution and factoring.

Key Concept Explanation
The equation involves an exponential term with a variable in the exponent. By substituting a new variable, we can simplify the equation and solve it.

Step-by-step Solution
1. Let . Then the equation becomes .
2. Factor the quadratic equation: .
3. Solve for : or .
4. Substitute back : or

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