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nika005
@nika005
August 2022
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(2х+3)(х-1)=12, помогите пожалуйста
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KABYKENOV
2
+х-3=12
2
-х-15=0
D=1+4*15*2=121 корень из 121=11
х1=1-11/4=-2,5
х2=1+11/4=3
1 votes
Thanks 1
karolinamik
(2х+3)(х-1)=12
2x^2-2x+3x-3-12=0
2x^2+x-15=0
D=1+120=121
x1=-1+11/4=5/2 =2.5
x2=-1-11/4=-3
1 votes
Thanks 1
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Answers & Comments
2-х-15=0
D=1+4*15*2=121 корень из 121=11
х1=1-11/4=-2,5
х2=1+11/4=3
2x^2-2x+3x-3-12=0
2x^2+x-15=0
D=1+120=121
x1=-1+11/4=5/2 =2.5
x2=-1-11/4=-3