Ответ:0;-9
Пошаговое (2х+5)² = х²–7х+25
4х^2+20х+25=х^2-7х+25
3х^2+27х=0
3х(х+9)=0
Х1=0
Х2=-9
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Ответ:0;-9
Пошаговое (2х+5)² = х²–7х+25
4х^2+20х+25=х^2-7х+25
3х^2+27х=0
3х(х+9)=0
Х1=0
Х2=-9