4y/3x·x/2y^3= ab^2/2c^2÷-3a^2b^2/4cd
4y/3x·x/2y^3= ab^2/2c^2÷-3a^2b^2/4cd
已知A(1,2) B(5,4) C(x,3) D(-3,y)且向量AB=向量CD,则实数x,y的值分别是?
已知A(1,2) B(5,4) C(x,3) D(-3,y) 且向量AB平行向量CD,则x-y=?
已知a、b互为相反数,c、d互为倒数,X=4(a-2)-(a-3b),y=c²d-(cd+c-1),解x+y/
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
几道因式分解..4ab(a+b)^2-6a^2b(a+b)(x+y)^2(x-y)+(x+y)(x-y)^22a(a-3
计算:(-2a^2b)(2/3ab^3)(-6b^2c^3) (x+y)(x-y)-(x-2y)(x+2y) (3x-2
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
A.A+(4X+3Y)B.A+(4X+6Y) C.A+2(
已知A=(1,2),B=(5,4),C=(x,3),D=(-3,y),且向量AB=向量CD.
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy
计算:(2a-5b)(2a^2-3ab+b^2) (3x+2y)(2x+3y)-(x-3y)(3x+4y)