Question

已知|m+2|+(n-3)^2=0,求2(m+n)-3(2n-m)的值.

Answer 1

|m+2|+(n-3)^2=0

m+2=0,n-3=0

m=-2,n=3

2(m+n)-3(2n-m)

=2m+2n-6n+3m

=5m-4n

=5×(-2)-4×3

=-22