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Mathematics
Algebra
Exponential Equations
Solve the equation using exact values. Check for any extraneous roots. 9^2x+4(9^x)=21.
1 answer
(9^x)^2 + 4(9^x) - 21 = 0
(9^x + 7)(9^x - 3) = 0
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Could someone please help me to solve this equation using exact values.
9^(2x)+4(9^x)=21 and also check for extraneous roots.
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