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26-11-2016
Mathematics

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solve the equation algebraically. 9^x-2 = (1/27)^x+4

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Аноним Аноним

26-11-2016

(3^2)^x-2 = (1/3^3)^x+4
3^2 ^(x-2) = (3^-3)^x+4
3^2x-4 = 3^-3(x+4)
3^2x-4 = 3^-3x-12
2x-4 = -3x-12
x= - 8/5
x= -1 3/4 , x= -1.6

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