4a^2\(-a\2b)×(-b\8a)是4a^2÷(-a2b)×(-b\8a)
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![4a^2\(-a\2b)×(-b\8a)是4a^2÷(-a2b)×(-b\8a)](/uploads/image/z/13320640-64-0.jpg?t=4a%5E2%5C%EF%BC%88-a%5C2b%29%C3%97%EF%BC%88-b%5C8a%29%E6%98%AF4a%5E2%C3%B7%EF%BC%88-a2b%29%C3%97%EF%BC%88-b%5C8a%29)
4a^2\(-a\2b)×(-b\8a)是4a^2÷(-a2b)×(-b\8a)
4a^2\(-a\2b)×(-b\8a)
是4a^2÷(-a2b)×(-b\8a)
4a^2\(-a\2b)×(-b\8a)是4a^2÷(-a2b)×(-b\8a)
4a^2÷(-a^2b)×(-b\8a)
=4a^2 ×(-1/a^2b)×(-b/8a)
=1/2a