作业帮若x2+4y2+2x-4y+2=0求5x2+16y2的算术平方根若2x平方－4x＋2＋根号[x＋2y－1]＝0求xy
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![若x2+4y2+2x-4y+2=0求5x2+16y2的算术平方根若2x平方－4x＋2＋根号[x＋2y－1]＝0求xy](/uploads/image/z/11504574-54-4.jpg?t=%E8%8B%A5x2%2B4y2%2B2x-4y%2B2%3D0%E6%B1%825x2%2B16y2%E7%9A%84%E7%AE%97%E6%9C%AF%E5%B9%B3%E6%96%B9%E6%A0%B9%E8%8B%A52x%E5%B9%B3%E6%96%B9%EF%BC%8D4x%EF%BC%8B2%EF%BC%8B%E6%A0%B9%E5%8F%B7%5Bx%EF%BC%8B2y%EF%BC%8D1%5D%EF%BC%9D0%E6%B1%82xy)
若x2+4y2+2x-4y+2=0求5x2+16y2的算术平方根若2x平方－4x＋2＋根号[x＋2y－1]＝0求xy
若x2+4y2+2x-4y+2=0求5x2+16y2的算术平方根
若2x平方－4x＋2＋根号[x＋2y－1]＝0求xy
若x2+4y2+2x-4y+2=0求5x2+16y2的算术平方根若2x平方－4x＋2＋根号[x＋2y－1]＝0求xy
x²+4y²+2x-4y+2=0
(x²+2x+1)+(4y²-4y+1)=0
(x+1)²+(2y-1)²=0
x=-1,y=1/2
5x²+16y²=5+4=9
2x²-4x+2+√(x＋2y－1)＝0
2(x-1)²+√(x＋2y－1)＝0
x=1,
x＋2y－1=0
y=0
xy=0