已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3ab²+4ab)的值.

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已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3ab²+4ab)的值.已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3

已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3ab²+4ab)的值.
已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3ab²+4ab)的值.

已知/a+2/+{b+1/4}²=0,求(a²b-2ab)-(3ab²+4ab)的值.
已知/a+2/+{b+1/4}²=0,
则 a+2=0 a=-2
b+1/4==0 b=-1/4
(a²b-2ab)-(3ab²+4ab)
=a²b-2ab-3ab²-4ab
=a²b-3ab²-6ab
=ab(a-3b-6)
a=-2 b=-1/4
=1/2(-2+3/4-6)
=-1+3/8-3
=-4+3/8
=-29/8