x+7=(x+7)(x²+6x+10)
(x²+6x+10)=1
х²+6х+9=0 D=36-36=0
х₁=х₂=-6/2= -3
х₃=-7
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x+7=(x+7)(x²+6x+10)
(x²+6x+10)=1
х²+6х+9=0 D=36-36=0
х₁=х₂=-6/2= -3
х₃=-7