已知实数x,y满足|x+y+7|+(xy-5)^2=0,求3x^2y^3+3x^3y^2
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![已知实数x,y满足|x+y+7|+(xy-5)^2=0,求3x^2y^3+3x^3y^2](/uploads/image/z/806770-10-0.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3%7Cx%2By%2B7%7C%2B%28xy-5%29%5E2%3D0%2C%E6%B1%823x%5E2y%5E3%2B3x%5E3y%5E2)
已知实数x,y满足|x+y+7|+(xy-5)^2=0,求3x^2y^3+3x^3y^2
已知实数x,y满足|x+y+7|+(xy-5)^2=0,求3x^2y^3+3x^3y^2
已知实数x,y满足|x+y+7|+(xy-5)^2=0,求3x^2y^3+3x^3y^2
|x+y+7|+(xy-5)^2=0,则 x+y+7=0,x+y=-7,xy-5=0,xy=5,所以 3x^2y^3+3x^3y^2 =3x^2y^2(y+x) =3*(xy)^2*(x+y) =3*5^2*(-7) =3*25*(-7) =-525