x^2-6xy+9y^2-(3/2)x+(9/2)y+m/2是一个完全平方式,求m的值
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x^2-6xy+9y^2-(3/2)x+(9/2)y+m/2是一个完全平方式,求m的值
x^2-6xy+9y^2-(3/2)x+(9/2)y+m/2是一个完全平方式,求m的值
x^2-6xy+9y^2-(3/2)x+(9/2)y+m/2是一个完全平方式,求m的值
x ² -6xy+9y ² --3/2x+9/2y+m/2
=( x -3y)²-3/2(x-3y)+m/2
因上式为一个完全平方式,故即为〔( x -3y)-3/4〕²
(3/4)² =m/2 求得m=9/8
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x,
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
(9x^2y-6xy^2)/3xy
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
x^2-xy-6y^2+3xy+y+2
3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程
-3x^2y+6xy^2-9xy=( )(x-2y+3)
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
求x^3 - 6x^2y + 11xy^2 - 6y^3 思路x^3 - 6x^2y + 11xy^2 - 6y^3= x^3 - 3x^2y + 2xy^2 - 3x^2y + 9xy^2 - 6y^3= (x^2 - 3xy + 2y^2)(x - 3y)= (x^2 - 2xy - xy + 2y^2)(x - 3y)(x - y)(x - 2y)(x - 3y)求思路
2x方-3x-6xy+9y
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
9x^3-6x^2y+xy^2因式分解因式分解9x^3-6x^2y+xy^2
3x^2-xy /9x^2-6xy+y^2=x/( )=( )/9x^2-y^2
2x-3y/xy×2x^2y^2/6x-9y
(X-9y)/(6xy^2-(x+3y)/(9x^2y)
3/x —2/y=3 (2x-3y-xy) / (7xy+9y-6x)=