Question

已知|a-2|+b^2+1=0,求a^2+ab／﹙a+b﹚^2的值

Answer 1

|a-2|+（b+1）^2=0,

|a-2|=0 a=2

(b+1)^2=0 b=-1

a^2+ab／﹙a+b﹚^2

=2^2+2×（-1）／﹙2-1﹚^2

=4-2

=2