(1) (2m+3)(2m-3)(2) x(x+1)+(2-x)(2+x)(3) (3x-y)(3x+y)+y(x+y)(4) (a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)
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(1)(2m+3)(2m-3)(2)x(x+1)+(2-x)(2+x)(3)(3x-y)(3x+y)+y(x+y)(4)(a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)(1)(2m+
(1) (2m+3)(2m-3)(2) x(x+1)+(2-x)(2+x)(3) (3x-y)(3x+y)+y(x+y)(4) (a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)
(1) (2m+3)(2m-3)
(2) x(x+1)+(2-x)(2+x)
(3) (3x-y)(3x+y)+y(x+y)
(4) (a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)
(1) (2m+3)(2m-3)(2) x(x+1)+(2-x)(2+x)(3) (3x-y)(3x+y)+y(x+y)(4) (a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)
(1) (2m+3)(2m-3)=4m²-9
(2) x(x+1)+(2-x)(2+x)=x+4
(3) (3x-y)(3x+y)+y(x+y)=9x²-y²+xy+y²=9x²+xy
(4) (a+二分之一b)(a-二分之一b)-(3a-2b)(3a+2b)
=a²-b²/4-(9a²-4b²)=-8a²+(15/4)b²
(1)4m*2-9
(2)x+2
(3)9x*2+xy
(4)-8a*2-四分之17乘b*2
已知m>4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3|
{[(1.5m+1.8m)×2+(4.5m×2m)]×(3.6m-0.15m)-0.8m×2m-1.5m×0.5m-1.0m×0.5m}×4间×3层+[(4.827m×2+2.4m×2m)×(3.6m-0.15m)-1.0m×2.1m×2面-1.0m×2.1m-1.2m×0.6m-1.2m×1.8m]×2层 +(6.387m+4.435m+6m+2.247m+2.247m×2+1.2m×2+3m×2)×(3.6m-0.15m)-1.2
m(m+1)(m+2)(m+3)+1?
1/m(m+1)+1/(m+1)(m+2)+1/(m+2)(m+3)+.+1/(m+9)(m+10)
计算:(m+3m+5m+…+2015m)-(2m+4m+6m+…+2014m)=
计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2008m)
(m+3m+5m+...+2009m)-(2m+4m+6m+...2008m)
(m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m)
(m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m)
(m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)=
计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)
m-2m-3m+4m-5m-6m+7m.2004m=?
(m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=?
2m/m^2-9-1/m+3(计算)
计算:(2m*7m*3m)/(-42)m.(m为正整数)m是次方
若多项式5x*x-2mxy-3y*y+4xy-3x+1中不含xy项,求(-(m*m*m)+2(m*m)-m+1)-(m*m*m+2m*m-m+4)
(m²-2m+1/m²-1+m²-m/m)÷(1+m/2,其中m=-3)
分解因式(1)m²+m-6;(2)m³+4m²+4m;(3)-m³+2m²-m