若 x2 + 3x +7 + 10/(x²+3x)=0, 设x2 + 3x = y ,则原方程化为 ___________________________.

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若 x2 + 3x +7 + 10/(x²+3x)=0, 设x2 + 3x = y ,则原方程化为 ___________________________.
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若 x2 + 3x +7 + 10/(x²+3x)=0, 设x2 + 3x = y ,则原方程化为 ___________________________.
若 x2 + 3x +7 + 10/(x²+3x)=0, 设x2 + 3x = y ,则原方程化为 ___________________________.

若 x2 + 3x +7 + 10/(x²+3x)=0, 设x2 + 3x = y ,则原方程化为 ___________________________.
y+7+10/y=0
y²﹢7y﹢10=0
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