Cho biểu thức: A=a^2+2a/2a+10+a-5/a+50-5a/2a(a+5).Rút gọn biểu thức A.
Giải thích
A=a2+2a2a+10+a−5a+50−5a2aa+5A=aa2+2a2aa+5+2a−5a+52aa+5+50−5a2aa+5A=a3+4a2−5a2aa+5A=a−12
A=a2+2a2a+10+a−5a+50−5a2aa+5A=aa2+2a2aa+5+2a−5a+52aa+5+50−5a2aa+5A=a3+4a2−5a2aa+5A=a−12