1) (x+4)²-x² =2x+1, 2)x(x²-2)=x³+8, 3) (x+5)(x-4)-x²+18=0

Question

1) (x+4)²-x² =2x+1, 2)x(x²-2)=x³+8, 3) (x+5)(x-4)-x²+18=0

Answer 1

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Comments

1 и 3 уравнения не правильные