①x2•x3=______;(-2y2)3=______;②3x4•4x3=______;(-y3)2=______;x5÷x3=______;③(2x+1)(
题型:填空题难度:简单来源:不详
①x2•x3=______;(-2y2)3=______; ②3x4•4x3=______;(-y3)2=______;x5÷x3=______; ③(2x+1)(2x-1)=______;(a-2)2=______. |
答案
①x2•x3=x2+3=x5; (-2y2)3=-8y6;
②3x4•4x3=12x7; (-y3)2=y6; x5÷x3=x2;
③(2x+1)(2x-1)=4x2-1; (a-2)2=a2-4a+4. |
举一反三
在实数范围内,若(y+2)2+=0,则x+y=______. |
计算2x3•(-2xy)(-xy)3的结果是______. |
计算: (1)-32-(-2)2; (2)(-10)2+[(-4)2-(3+32)×2]; (3)(-1)4+(-23)÷×(-)3; (4)(-2)2010+(-2)2011; (5)(-0.25)2010×42011. |
计算: (1)(-1)3; (2)(-1)2012; (3)(-0.1)3; (4)()4; (5)(-2)3×(-2)2; (6)(-)3×(-)5; (7)103; (8)02012. |
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