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sazatskayam
@sazatskayam
October 2021
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alinasayf
5-х=х^2+30х+225
-х^2-30х-225+5-х=0
-х^2-31х-220=0|*(-1)
х^2+31х+220=0
D=961-880=81=9^2
x1=-11,x2=-20
проверка:
х1=-11:121-341+220=0
х2=-20:400-620+220=0
ответ: x1=-11, x2=-20
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Answers & Comments
-х^2-30х-225+5-х=0
-х^2-31х-220=0|*(-1)
х^2+31х+220=0
D=961-880=81=9^2
x1=-11,x2=-20
проверка:
х1=-11:121-341+220=0
х2=-20:400-620+220=0
ответ: x1=-11, x2=-20