帮帮忙计算题.1、3x^2×(-3xy)^2-x^2(x^2×y^2-5x)2、5x(x^2-2x+4)+x^2(x-1)3、求(3x+1)(2x-3)-(6x-5)(x-4)的值,其中x=-24、若(3x^2-2x+1)(x+b)中不含x^2项,求b的值.5、2(x+y)^2-2y(y+2x)6、
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![帮帮忙计算题.1、3x^2×(-3xy)^2-x^2(x^2×y^2-5x)2、5x(x^2-2x+4)+x^2(x-1)3、求(3x+1)(2x-3)-(6x-5)(x-4)的值,其中x=-24、若(3x^2-2x+1)(x+b)中不含x^2项,求b的值.5、2(x+y)^2-2y(y+2x)6、](/uploads/image/z/1973867-59-7.jpg?t=%E5%B8%AE%E5%B8%AE%E5%BF%99%E8%AE%A1%E7%AE%97%E9%A2%98.1%E3%80%813x%5E2%C3%97%EF%BC%88-3xy%EF%BC%89%5E2-x%5E2%EF%BC%88x%5E2%C3%97y%5E2-5x%EF%BC%892%E3%80%815x%EF%BC%88x%5E2-2x%2B4%EF%BC%89%2Bx%5E2%EF%BC%88x-1%EF%BC%893%E3%80%81%E6%B1%82%EF%BC%883x%2B1%EF%BC%89%EF%BC%882x-3%EF%BC%89-%EF%BC%886x-5%EF%BC%89%EF%BC%88x-4%EF%BC%89%E7%9A%84%E5%80%BC%2C%E5%85%B6%E4%B8%ADx%3D-24%E3%80%81%E8%8B%A5%EF%BC%883x%5E2-2x%2B1%EF%BC%89%EF%BC%88x%2Bb%EF%BC%89%E4%B8%AD%E4%B8%8D%E5%90%ABx%5E2%E9%A1%B9%2C%E6%B1%82b%E7%9A%84%E5%80%BC.5%E3%80%812%EF%BC%88x%2By%EF%BC%89%5E2-2y%EF%BC%88y%2B2x%EF%BC%896%E3%80%81)
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