-x²+3x+18=0
D=9+72=81
x1,2= (3-9)/2
x1,2=±3
+ - +
----------------.////////////////////////.---------------------
-3 6
ответ:
-x²+3x+18=0
D=9+72=81
x1,2= (3-9)/2
x1,2=±3
+ - +
----------------.////////////////////////.---------------------
-3 6
ответ: