计算:(1)(-2a2b)2•(6ab)÷(-3b2)(2)(x+3y)(x-3y)(3)(2x-1)(3x+2)-6x(x-2)(4)(3x-y)2-(3x+
题型:解答题难度:一般来源:不详
计算: (1)(-2a2b)2•(6ab)÷(-3b2) (2)(x+3y)(x-3y) (3)(2x-1)(3x+2)-6x(x-2) (4)(3x-y)2-(3x+2y)(3x-2y) |
答案
(1)原式=4a4b2•(6ab)÷(-3b2)=-8a5b; (2)原式=x2-9y2; (3)原式=6x2+4x-3x-2-6x2+12x=13x-2; (4)原式=9x2-6xy+y2-(9x2-4y2)=9x2-6xy+y2-9x2+4y2=5y2-6xy. |
举一反三
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