若|3x+6|+(3-y)2=0,求多项式4-3(x-2y)-(2x-3y)的值.
问题描述:
若|3x+6|+(3-y)2=0,求多项式4-3(x-2y)-(2x-3y)的值.
答
∵|3x+6|+(3-y)2=0,
∴3x+6=0,3-y=0,即x=-2,y=3,
则原式=4-3x+6y-2x+3y=4-5x+9y=4+10+27=41.