如果x+y=6,xy=3则3x2y+3xy2
问题描述:
如果x+y=6,xy=3则3x2y+3xy2
答
3x²y+3xy²
=3xy(x+y)
=3×3×6
=54
如果x+y=6,xy=3则3x2y+3xy2
3x²y+3xy²
=3xy(x+y)
=3×3×6
=54