作业帮(a/3a+6)-(5/a²+4a+4)怎么算,
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 19:32:23
x)H7N60OTS646I6|dguulR_`gCu(F`@D
T,S*2F(54!(F16yv A[,
(a/3a+6)-(5/a²+4a+4)怎么算,
(a/3a+6)-(5/a²+4a+4)怎么算,
(a/3a+6)-(5/a²+4a+4)怎么算,
a/(3a+6)-5/(a²+4a+4)
=a/[3(a+2)]-5/(a+2)²
=a(a+2)/[3(a+2)²]-5*3/[3(a+2)²]
=[a(a+2)-15]/[3(a+2)²]
=[a²+2a-15]/[3(a+2)²]
=(a+5)(a-3)/[3(a+2)²]