已知:-m+2n=5,那么4(m-2n)2+6n-3m-60的值为_.

问题描述:

已知:-m+2n=5,那么4(m-2n)2+6n-3m-60的值为______.

∵-m+2n=5,
∴m-2n=-5,
4(m-2n)2+6n-3m-60=4(m-2n)2-3(m-2n)-60
=4×(-5)2-3×(-5)-60
=100+15-60
=55.
故答案为55.