I*36
45x²-36x+4=0
D=1296-720= 576
x1= (36+24)/90= 60/90= 2/3
x2= (36-24)/90= 12/90= 2/15
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I*36
45x²-36x+4=0
D=1296-720= 576
x1= (36+24)/90= 60/90= 2/3
x2= (36-24)/90= 12/90= 2/15