计算:-3x2y3•x2y2=______,(x+1)(x-3)=______.
题型:填空题难度:一般来源:不详
计算:-3x2y3•x2y2=______,(x+1)(x-3)=______. |
答案
-3x2y3•x2y2=-3x2+2y3+2=-3x4y5 (x+1)(x-3)=x2-3x+x-3=x2-2x-3 故答案为:-3x4y5,x2-2x-3 |
举一反三
观察下列各式:x,3x2,7x3,15x4,31x5,….按此规律写出的第8个式子是______. |
计算: (1)2x(4x2-2x+1) (2)(6a3-4a2+2a)÷2a. |
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