Question

已知A=m-n根号n-m+3是n-m+3的算术平方根,B=m-2n+3根号m+2n是m+2n的立方根,求B-A的值.

Answer 1

m-n=2

m-2n+3=3

m=4 n=2

n-m+3=1

m+2n=8

A=1,B=2

B-A=1