(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)那(3a^2b+1/4ab^2)*(3/4ab^2+a^2b)呢

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(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)那(3a^2b+1/4ab^2)*(3/4ab^2+a^2b)呢(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)那(3a^2b+

(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)那(3a^2b+1/4ab^2)*(3/4ab^2+a^2b)呢
(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)
那(3a^2b+1/4ab^2)*(3/4ab^2+a^2b)呢

(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)那(3a^2b+1/4ab^2)*(3/4ab^2+a^2b)呢
(3a²b+1/4ab²)-(3/4ab²+a²b)
=3a²b+1/4ab²-3/4ab²-a²b
=2a²b-1/2ab²

=3a^2b-a^2b+1/4ab^2-3/4ab^2
=2a^2b-2/4ab^2
=2a^2b-1/2ab^2

2a^2b-2/4ab^2