Пожалусто помогите решить СРОЧНО даю 20 балов

1)2x²-50=0
2)4x²-8x=0
3)x²-8x+7=0
4)2x⁴-5x+2=0
5)[tex] \frac{x-2}{x+6} = \frac{x-3}{x-1} [/tex]

6)y=3-2x-2x²
7)y=x²-4x+6
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