已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
问题描述:
已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
答
已知|x-3y-6|与(x+2y-1)²互为相反数则|x-3y-6| = -(x+2y-1)²所以|x-3y-6| + (x+2y-1)² = 0因为|x-3y-6|>=0,(x+2y-1)²>=0,但|x-3y-6| + (x+2y-1)² = 0所以x-3y-6 = 0,x+2y-1= 0联立方程得,x...