已知|a-1/2|+(b+2)^2=0,求代数式a^2-3a^2b+4ab^2-2b^3
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已知|a-1/2|+(b+2)^2=0,求代数式a^2-3a^2b+4ab^2-2b^3
已知|a-1/2|+(b+2)^2=0,求代数式a^2-3a^2b+4ab^2-2b^3
已知|a-1/2|+(b+2)^2=0,求代数式a^2-3a^2b+4ab^2-2b^3
因为|a-1/2|+(b+2)^2=0
所以|a-1/2|=0 (b+2)^2=0
所以a=0.5 b=-2
a^2-3a^2b+4ab^2-2b^3
=0.25+2X0.75+4X0.5X4-2(-8)
=25.75
请点击下面的“选为满意答案”按钮,
b=-2,a=1/2
由|a-1/2|+(b+2)^2=0,得a=1/2,b=-2,将其代入代数式a^2-3a^2b+4ab^2-2b^3=(1/2)^2-3*(1/2)^2*(-2)+4*1/2*(-2)^2-2(-2)^3=103/4