Ответ:
5x+2 = 20x^2=19x-6
10x^2+7x-4=0
D=49+160=209
x1=(-7-)/20
x2=(-7+)/20
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Ответ:
5x+2 = 20x^2=19x-6
10x^2+7x-4=0
D=49+160=209
x1=(-7-)/20
x2=(-7+)/20