初一上册先化简,在求值!先化简在求值:2(a^2+1/2b^3-ab^2)+3a^3-(0.11a^2-31ab^2+3a^3)-4b^3,其中a=1,b=-1要写原式=去括号后的式子=结果=结果
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![初一上册先化简,在求值!先化简在求值:2(a^2+1/2b^3-ab^2)+3a^3-(0.11a^2-31ab^2+3a^3)-4b^3,其中a=1,b=-1要写原式=去括号后的式子=结果=结果](/uploads/image/z/1725382-46-2.jpg?t=%E5%88%9D%E4%B8%80%E4%B8%8A%E5%86%8C%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%9C%A8%E6%B1%82%E5%80%BC%21%E5%85%88%E5%8C%96%E7%AE%80%E5%9C%A8%E6%B1%82%E5%80%BC%3A2%EF%BC%88a%5E2%2B1%2F2b%5E3-ab%5E2%29%2B3a%5E3-%280.11a%5E2-31ab%5E2%2B3a%5E3%29-4b%5E3%2C%E5%85%B6%E4%B8%ADa%3D1%2Cb%3D-1%E8%A6%81%E5%86%99%E5%8E%9F%E5%BC%8F%3D%E5%8E%BB%E6%8B%AC%E5%8F%B7%E5%90%8E%E7%9A%84%E5%BC%8F%E5%AD%90%3D%E7%BB%93%E6%9E%9C%3D%E7%BB%93%E6%9E%9C)
初一上册先化简,在求值!先化简在求值:2(a^2+1/2b^3-ab^2)+3a^3-(0.11a^2-31ab^2+3a^3)-4b^3,其中a=1,b=-1要写原式=去括号后的式子=结果=结果
初一上册先化简,在求值!
先化简在求值:2(a^2+1/2b^3-ab^2)+3a^3-(0.11a^2-31ab^2+3a^3)-4b^3,其中a=1,b=-1
要写原式=去括号后的式子=结果=结果
初一上册先化简,在求值!先化简在求值:2(a^2+1/2b^3-ab^2)+3a^3-(0.11a^2-31ab^2+3a^3)-4b^3,其中a=1,b=-1要写原式=去括号后的式子=结果=结果
原式=2a^2+b^3-2ab^2+3a^3-0.11a^2+31ab^2-3a^3-4b^3
=1.89a^2-3b^3+29ab^2
=1.89*1-3*(-1)+29*1
=27.89