решите уравнения
1) 18-(x-5)(x-4)= -2
2) 5x+(2x+1)(x-3)=0 4) x^2-5=(x-5)(2x-1).
1) 18-(x-5)(x-4)= -2
2) 5x+(2x+1)(x-3)=0 4) x^2-5=(x-5)(2x-1).
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Answers & Comments
1) 18-х+5Х(х-4)=-2
18-х+5х-20=-2
-х+5х=-2-18+20
4х=0
Ответ:х=0
2)5х+2х+1Х(х-3)=0
5х+2х+х-3=0
8х=3|:8
х=3/8
Ответ:х=3/8
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