已知-x+2y=5,那麼5(x一2y)∧2一3(x一2y)一60的值為()A 已知-x+2y=5,那麼5(x一2y)∧2一3(x一2y)一60的值為()A -17 B -7 C -3 D 7

已知-x+2y=5,那麼5(x一2y)∧2一3(x一2y)一60的值為()A 已知-x+2y=5,那麼5(x一2y)∧2一3(x一2y)一60的值為()A -17 B -7 C -3 D 7

-x+2y=5
∴x-2y=-5
5(x一2y)∧2一3(x一2y)一60
=5×(-5)^2-3×(-5)-60
=125+15-60
=80