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моли21
@моли21
August 2022
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решите уравнения (2х+3)(3х+1)+(5х+2)(2х+5 )=(4х-1)
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elizaveta090320
6x^2+9x+3+2x+10x^2+4x+25x+10=(4x-1)
16x^2+40x+13=(4x-1)
16x^2+40x+13-(4x-1)=0
16x^2+40x+13-4x+1=0
16x^2+36x+14=0
4x(4x+9)+14=0
4x=0 или (4x+9)+14=0
x=0 4x+9=-14
4x=-23
x=-23/4
я проверила,вроде правильно
1 votes
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Answers & Comments
16x^2+40x+13=(4x-1)
16x^2+40x+13-(4x-1)=0
16x^2+40x+13-4x+1=0
16x^2+36x+14=0
4x(4x+9)+14=0
4x=0 или (4x+9)+14=0
x=0 4x+9=-14
4x=-23
x=-23/4
я проверила,вроде правильно