Объяснение:
x1=8
x2= -5
х²+bx+c=0
x1+x2= -b
x1•x2=c
8+(-5)= -b => 3= -b => b= -3
8•(-5)=c => -40=c
x²-3x-40=0
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Объяснение:
x1=8
x2= -5
х²+bx+c=0
x1+x2= -b
x1•x2=c
8+(-5)= -b => 3= -b => b= -3
8•(-5)=c => -40=c
x²-3x-40=0