Ответ:
{4x²-x>0
x²=4х
х=4
х1=7
х2=-4
x²-3x-28
D=9-4×(-28)=121=11²
x1/2=3+-11
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Ответ:
{4x²-x>0
x²=4х
х=4
х1=7
х2=-4
x²-3x-28
D=9-4×(-28)=121=11²
x1/2=3+-11