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a=2
b=4
c=-576
x= -b² +- √b²-4ac
↔/2a
x= - (4)+-√4²-4(2*-576)
↔/2(2)
x=-4+-√16+4608
↔/4
x=-4+-√4624
↔/4
x=-4+-68
↔/4
x1=-4+68
↔/4
x1=64
↔/4
x1=64/4
x1=16
x2=-4-68
↔/4
x2=-72
↔/4
x2=-72/4
x2=-18