已知-x+2y=6,则3(x-2y)2-5(x-2y)+6的值是_.

问题描述:

已知-x+2y=6,则3(x-2y)2-5(x-2y)+6的值是______.

∵-x+2y=6,即x-2y=-6,
∴原式=3×36-5×(-6)+6=144.
故答案为:144