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istratova2005
@istratova2005
July 2022
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Помогите решить уравнение (2х-5)(х+1)=6х
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n1982
.........................
0 votes
Thanks 1
bekaakazinov
2x^2+2x-5x-5=6x
2x^2+2x-5x-5-6x=0
2x^2-9x-5=0
a=2 D=b^2-4ac D=81-4x2x(-5)=81+40=121=11^2
b=9 x1=-9+11/2=1
c=-5 x2=-9-11/2=-10
2 votes
Thanks 1
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Answers & Comments
2x^2+2x-5x-5-6x=0
2x^2-9x-5=0
a=2 D=b^2-4ac D=81-4x2x(-5)=81+40=121=11^2
b=9 x1=-9+11/2=1
c=-5 x2=-9-11/2=-10