Question

已知m,x,y满足：（x-5）+|m|=0,-2ab^y-1与4ab^3的同类项,

Answer 1

（x-5）+|m|=0

x=5,m=0

-2ab^y-1与4ab^3的同类项

y-1=3

y=4

（2x^2-3xy+6y^2）-m(3x^2-xy+9y^2)

=2x^2-3xy+6y^2

=50-60+96

=86