- 下列运算,结果正确的是( ) A. B. C. D.
- 化简2x+2y5a2b•10ab2x2-y2的结果为______.
- 计算:(1)4a2b215m3÷-8ab235m2;(2)(xy-x2)÷x-yxy.
- (1)化简:x2-9x2+6x+9•12x-6(2)解方程:7x-2=5x.
- 计算:(1)6a8y•2y23a2=______;(2)x+1y÷x2-1y2=______.
- (2x3y)2•(3y4x)3.
- 计算:a-2a+3÷a2-4a2+6a+9.
- 计算:x+1x2+2x+1÷x+1x-1
- 计算(1)1x+1+2x+1x2-1;(2)a-ba×(bb-a)2÷b2a2.
- 计算(ab-ba)÷a+ba的结果为______.
- 化简的结果是( ) A.-m-1B.-m+1C.-mn+mD.-mn-n
- 化简:a-1a÷a-1a2.
- 正数范围内定义一种运算“﹡”,其规律是a*b=1a•1b,则:(1)(x+1)*1x+2=______,(2)当3﹡(x+1)=1时.求x=______.
- 计算:a3b2c÷ab2c2•(-2b2ac)2
- (1)计算:(y6x2)2÷(-y24x)2.(2)计算:x2-2x+1x2-1÷x-1x2+x.