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1
x²+3x+2=0
x1+x2=-3 U x1*x2=2
x1=-2 U x2=-1
2
3x²-12x-15=0
x²-4x-5=0
x1+x2=4 U x1*x2=-5
x1=-1 U x2=5
x1 = 1
logx(x)/logx(0,1x) + logx(x)/logx(0,5x) = 0
logx(0,5x) + logx(0,1x) = 0
logx(0,5x) = logx(1/(0,1x))
0,5x = 1/0,1x
0,05x^2 = 1
x^2 = 20
x2 = 2sqrt{5}
Ответ: 1; 2sqrt{5}.