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olsn
@olsn
August 2021
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Разложить на множители -5x^2+30x-45
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sharovatanya20
1)2x^2-5x+2
D=25-4*2*2=25-16=3
х1=(5-3)/2*2=1/2
х2=(5+3)/4=2
2(х-1/2)(х-2).
2) X^2-3x-10
D=9-4*(-10)=9+40=49 (7)
х1=(3+7)/2=5
х2=(3-7)/2=-2
(х-5)(х+2)
0 votes
Thanks 1
НяхаКакаха234
1)2x^2-5x+2
D=25-4*2*2=25-16=3
х1=(5-3)/2*2=1/2
х2=(5+3)/4=2
2(х-1/2)(х-2).
2) X^2-3x-10
D=9-4*(-10)=9+40=49 (7)
х1=(3+7)/2=5
х2=(3-7)/2=-2
(х-5)(х+2)
0 votes
Thanks 1
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Answers & Comments
D=25-4*2*2=25-16=3
х1=(5-3)/2*2=1/2
х2=(5+3)/4=2
2(х-1/2)(х-2).
2) X^2-3x-10
D=9-4*(-10)=9+40=49 (7)
х1=(3+7)/2=5
х2=(3-7)/2=-2
(х-5)(х+2)
D=25-4*2*2=25-16=3
х1=(5-3)/2*2=1/2
х2=(5+3)/4=2
2(х-1/2)(х-2).
2) X^2-3x-10
D=9-4*(-10)=9+40=49 (7)
х1=(3+7)/2=5
х2=(3-7)/2=-2
(х-5)(х+2)