已知I 3x+2y-4 I + 4(5x+7y-3)²=0,求x,y的值.

问题描述:

已知I 3x+2y-4 I + 4(5x+7y-3)²=0,求x,y的值.

{3x+2y-4=0
{5x+7y-3=0
解得:x=2 y=-1