Помогите решить два примера с квадратными уравнениями[tex] \frac{1}{ x^2+3x+3} - \frac{9}{2(x^2+3x+4)} + \frac{1}{x^2+3x+2}=0 \\ \\ (x^2+5x+7)^2 -(x+2)(x+3)=1[/tex]
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