已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
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已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
已知|x-3y-6|与(x+2y-1)²互为相反数,则x=( ),y=( )
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=3,y= -1
两者都是大于等于零的数,所以两者都是零,解方程组x-3y-6=0和x+2y-1=0即可
y=-1,x=3