Ответ:
2×x²+6x+9=x²+4x+4+34
x²+6x-x²-4x=4+34-9-2
6x=27
x=27/6
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Ответ:
2×x²+6x+9=x²+4x+4+34
x²+6x-x²-4x=4+34-9-2
6x=27
x=27/6