[tex]8^{x+2}-3*8^{x+1}=5 [/tex]
решить уравнение
8^(x+2) -3*8^(x+1)=5
8^2*8^x - 3*8^x*8=5
64*8^x-24*8^x=5
40*8^x=5
8^x=5/40
8^x=8^(-1)
x=-1
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Verified answer
8^(x+2) -3*8^(x+1)=5
8^2*8^x - 3*8^x*8=5
64*8^x-24*8^x=5
40*8^x=5
8^x=5/40
8^x=8^(-1)
x=-1