(a-b+4ab/a-b)(a+b-4ab/a+b)其中a=3/2.b=-1/2

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(a-b+4ab/a-b)(a+b-4ab/a+b)其中a=3/2.b=-1/2

[a-b+4ab/(a-b)]*[a+b-4ab/(a+b)]
=[(a-b)^2+4ab]/(a-b)*[(a+b)^2-4ab]/(a+b)
=(a+b)^2/(a-b)*(a-b)^2/(a+b)
=(a+b)(a-b)
=a^2-b^2
a=3/2,b=-1/2
原式
=(3/2)^2-(-1/2)^2
=9/4-1/4
=2