A few days ago
Indices question?
What are the steps to solve this
3^(2x) – 7(3^(x)) = 18
Please list down clearly all steps taken to derive the answer. Thanks
Top 1 Answers
A few days ago
Favorite Answer
Let y = 3^x, then your equation becomes:
y^2 – 7y = 18
y^2 -7y -18 = 0
(y – 9)(y + 2) = 0
y = 9 ; y = -2[extraneous]
3^x = 9
3^x = 3^2
x = 2
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