ПОМОГИТЕ, ОЧЕНЬ СРОЧНО НАДО! РЕШИТЕ УРАВНЕНИЯ:
1)x^2\8 - x\6=3.5
2)(2x-1)^2-(x-3)(x+3)=2(2x+3)
3) 3(x^2-2)=(x-5)(x+1)+5
3)x^2-1\3 - 2x-3\7=7
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