Ответ:
3+30x+63=0 ║÷3
+10x+21=0
D=100-4*21=16
= 4
==-7
==-3
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Ответ:
3+30x+63=0 ║÷3
+10x+21=0
D=100-4*21=16
= 4
==-7
==-3