4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4五分钟之内~
来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/06 03:05:14
4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4五分钟之内~4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4五分钟之内~4x^2y-[6
4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4五分钟之内~
4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4
五分钟之内~
4x^2y-[6xy-2(4xy-2)-x^2y]+1,其中x=-1/2,y=4五分钟之内~
4x^2y-[6xy-2(4xy-2)-x^2y]+1
=4x^2y-6xy+8xy-4+x^2y+1
=5x^2y+2xy-3 把x=-1/2,y=4带入
=5(-1/2)²×4+2(-1/2)×4-3
=5-4-3
=-2
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程
(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
1-2/x+y=xy,4y+6x=xy.求xy的解?
4x^2y-6xy^2+2xy因式分解
因式分解:-4x^2y-6xy^2+2xy
已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎
已知 x+y=4,xy=2,求2xy+4xy+2xy
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)
(-3x^y+2xy)-( )=4x^+xy
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
(-3xy+2xy)-(4xy+xy)
x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
3(x^2y+xy)-4(xy-2x^2y)-(-xy)