Liczby 1, -3 są jedynymi pierwiastkami równania:a) X3+2x2=3x
b) X3+3x2-x-3=0
c) (x-1)2(x2+6x+9)=0
d) (x+1)(x2-6x+9)=0
C.
(x-1)2(x^2+6x+9)=0
x=1 ---> z pierwszego nawiasu
delta = b^2-4ac
delta= 36-36=0
x= -b/2a
x= -6/3= -3
x=1 i x=-3
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C.
(x-1)2(x^2+6x+9)=0
x=1 ---> z pierwszego nawiasu
delta = b^2-4ac
delta= 36-36=0
x= -b/2a
x= -6/3= -3
x=1 i x=-3