X(x²-6x+9-4)=12(x-5)
x((x-3)²-4)=12(x-5)
x(((x-3)-2)*((x-3)+2))=12(x-5)
x(x-5)(x-1)-12(x-5)=0
(x-5)(x(x-1)-12)=0
x-5=0
x=5
x(x-1)-12=0
x²-x-12=0
D=49
x1=4 x2=-3
Ответ:-3;4;5
Х+3х=5+4/2
4х=5+2
4х=7
х=7:4
х=7/4
х=1,75
<span>10y=-3
у=-3/10
у=-0,3 </span>
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