问几道数学题:1)已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值.2)已知x+5y=6,求x^2+
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问几道数学题:1)已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值.2)已知x+5y=6,求x^2+5xy+30y的值
![问几道数学题:1)已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值.2)已知x+5y=6,求x^2+](/uploads/image/z/1883876-68-6.jpg?t=%E9%97%AE%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%3A1%29%E5%B7%B2%E7%9F%A5x%5E2%2By%5E2%2B6x-4y%2B13%3D0%2C%E6%B1%82%28x%2By%29%5E2008%E7%9A%84%E5%80%BC.2%29%E5%B7%B2%E7%9F%A5x%2B5y%3D6%2C%E6%B1%82x%5E2%2B)
1.x^2+y^2+6x-4y+13=0
(x+3)^2+(y-2)^2=0
x+3=0,y-2=0
x=-3,y=2
(x+y)^2008=(-1)^2008=-1
2.x^2+5xy+30y
=x(x+5y)+30y
=6x+30y
=6(x+5y)
=6*6
=36
(x+3)^2+(y-2)^2=0
x+3=0,y-2=0
x=-3,y=2
(x+y)^2008=(-1)^2008=-1
2.x^2+5xy+30y
=x(x+5y)+30y
=6x+30y
=6(x+5y)
=6*6
=36
问几道数学题:1)已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值.2)已知x+5y=6,求x^2+
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