已知丨4x+3-6丨+[2x+y-4]^2=0,求2x-3y的值
问题描述:
已知丨4x+3-6丨+[2x+y-4]^2=0,求2x-3y的值
答
丨4x+3y-6丨+[2x+y-4]^2=0,
说明
4x+3y-6=0
且 2x+y-4=0
所以
y=(4x+3y-6)-2(2x+y-4)=2
x=1
2x-3y=-4