(4a-b)(a+b)/(4a^2b-2ab^2)已知 a+b=3.5 a-b=1.5

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(4a-b)(a+b)/(4a^2b-2ab^2)已知a+b=3.5a-b=1.5(4a-b)(a+b)/(4a^2b-2ab^2)已知a+b=3.5a-b=1.5(4a-b)(a+b)/(4a^2b

(4a-b)(a+b)/(4a^2b-2ab^2)已知 a+b=3.5 a-b=1.5
(4a-b)(a+b)/(4a^2b-2ab^2)
已知 a+b=3.5 a-b=1.5

(4a-b)(a+b)/(4a^2b-2ab^2)已知 a+b=3.5 a-b=1.5
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