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Kholod5678
@Kholod5678
July 2022
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найти корни
(-х-1)(х-4)=х(4х-11)
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fencingepee
-x^2+4x-x+4=4x^2-11x
5x^2-15x-4=0
D=225+80=305
x1=15-
/10
x2=15+
/10
2 votes
Thanks 6
rico5674
-x^2-x+4x+4=4x^2-11x
-5x^2+14x+4=0
D=b^2-4ac=196-4*(-5)*4=196+80=276
D>0=>2корня
x1,2=(-b+-√D)/2a=(-14+-√276)/-10
0 votes
Thanks 1
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Answers & Comments
5x^2-15x-4=0
D=225+80=305
x1=15-/10
x2=15+/10
-5x^2+14x+4=0
D=b^2-4ac=196-4*(-5)*4=196+80=276
D>0=>2корня
x1,2=(-b+-√D)/2a=(-14+-√276)/-10