3-2x大于3-2y
我們可以取數(shù)：
當(dāng)x=1,y=2時(shí),
3-2x=3-2 3-2y=3-4 3-2x大于3-2y
=1 =-1
當(dāng)X=0,y=1時(shí)
3-2x=3-0 3-2y=3-2 3-2x大于3-2y
=3 =1
當(dāng)X=-2,y=-1時(shí)
3-2x=3+4 3-2y=3+2 3-2x大于3-2y
=7 =5