化简:①(3a-1)(2a+1) ②(m-3n)(m+7n) ③(2x-5y)(2y-3x)
化简:①(3a-1)(2a+1) ②(m-3n)(m+7n) ③(2x-5y)(2y-3x)
7(a-1)+x(a-1),3(a-b)²+6(b-a),2(m-n)²-m(m-n),x(x-y)
把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
三道计算题(-2y^2-3x)(3x-2y^2) -(3m^2-n)(3m^2+n) (1/2a^m-b^n)(b^n+
四道计算题(-2y^2-3x)(3x-2y^2) -(3m^2-n)(3m^2+n) (1/2a^m-b^n)(b^n+
化简 4y×5= 5a+3+3a= m÷2+m÷5= 3x+3y-8y+x= 6x×7y= (3n+3m)÷3=
已知集合S={(x,y)|x=m,y=-3m+2,m∈N+},T={(x.y)|x=n,y=a(n²-n+1)
集合M={X=3m+1,m∈N*},N={y/y=5n+2,n∈N*},则M∩N=?
4(x-y)三次方-2y(y-x)平方 3m(m-n)平方-6n(n-m) 8a(x-y)三次方-b(y-x)平方
若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m,
7(a-1)+x(a-1)和3(a-b)²+6(b-a)和2(m-n)²-m(m-n)和x(x-y)