SOLUTION: Please help me solve this problem: {{{3^(2x)-10(3^x)+9=0}}}

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Question 141869This question is from textbook Algebra and Trigonometry
: Please help me solve this problem: 3%5E%282x%29-10%283%5Ex%29%2B9=0 This question is from textbook Algebra and Trigonometry

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let y=3^x __ y^2-10y+9=0

factoring __ (y-1)(y-9)=0

y-1=0 __ y=1 __ 3^x=1 __ x=0

y-9=0 __ y=9 __ 3^x=9 __ x=2