(х+3)^-2(х+3)-8=0
х+3=у
y^2-2y-8=0
D = b2 - 4ac = (-2)2 - 4·1·(-8) = 4 + 32 = 36
у=-2 у=4
x+3=-2 x+3=4
x=-2-3=-5 x=4-3=1
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