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Note: kedua akar sama artinya D=0
mx²+(2m+4)x+m=0
=> D=0
b²-4ac=0
(2m+4)²-4(m)(m)=0
4m²+16m+16-4m²=0
16m+16=0
m=(-1)
♦ -x²+2x-1=0
jumlah kedua akar= -b/a
-(2)/(-1) = 2.
semangat ya :3