Question

请将解题所经过的所有步骤,都详细的写出来,然后再给我出几道同类型的题,

Answer 1

(a^2+4a+4-a^2-8)/(a+2)^2*[a(a+2)/4(a-1)]

=4(a-1)/(a+2)^2*[a(a+2)/4(a-1)]

=a/(a+2)