先化简后求值m2/m-3+9/9-m2/1/m+3,其中m=1help
问题描述:
先化简后求值m2/m-3+9/9-m2/1/m+3,其中m=1
help
答
m²/(m-3)+9/(9-m²)÷1/(m+3) 你这样写别人才看得懂
=m²/(m-3)+9/(9-m)²×(m+3)
=m²/(m-3)-9/(m-3)
=(m²-9)/(m-3)
=m+3
记得采纳哟!