Exponentials, Logarithms, and Growth or Decay Modelling
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Free Maths Q & A Practice
1 of 5 free exam-style exercises in this topic
Solve \(3^{2x}-10(3^x)+9=0\).
Exponential substitution
Method: Let u = 3^x, solve the quadratic, and retain u > 0
Select the exact answer.
Select one option.
A
\(x=2\)
B
\(x=0,2\)
C
\(x=1,2\)
D
\(x=0,1\)
E
\(x=-1,2\)
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