(4a-b)(a+b)/(4a^2b-2ab^2)已知 a+b=3.5 a-b=1.5
问题描述:
(4a-b)(a+b)/(4a^2b-2ab^2)
已知 a+b=3.5 a-b=1.5
答
a+b=3.5 a-b=1.5 a=2.5 b=1 (4a-b)(a+b)/(4a^2b-2ab^2)=(10-1)*3.5/(10^2-5)=63/190