(1):5m-(2m-4n)(2):2×2+3(2x-x²)(3):x-(3x-2)+(2x+3) (4):3
计算:(1)(m-n)^2*(n-m)^5*(m-n)^5 (2)(-x)^2*x^3+2x^3*(-x)^2-x*x^
已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值;(2)求x^3m-2n的值
(x+3)(x-4)=X^2-mx+n,则m^3n=
计算(1)2(x+1)^2+4(-x-1) (2)(4x^2+3x)^2-(x+1)^2 (3)-a(m-n)+(m-n
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
设不等式(m+n)x+(2m-3n)
因式分解 x^3-5x^2+6x (2)4m^3+m-1
设M={x|log1/2(x²-3x-4)>log1/2(2x+10)},N={x|(x²-10ax
1.计算1(m+2n)(m-2n);2(2n+5)(n-3);3(x+2y)²;4(2x+b)(3x+d);
配方2x²-3x-7=2(x-m)²+n,则m= ( ),n=( ).
已知(1-4x)m=-4x*3+5x*2-5x+1,则m=
已知向量m=(根号3sin(x/4),1),向量n=(cos(x/4),cos^2(x/4))f(x)=m.n