-x² +3x +130 =0
=> x²-3x-130=0
D= 9 +520 =529. √D=23
x1 = (3+23)/2 =13
x2 =(3-23)/2= - 10
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-x² +3x +130 =0
=> x²-3x-130=0
D= 9 +520 =529. √D=23
x1 = (3+23)/2 =13
x2 =(3-23)/2= - 10