x-2y=3、2x-3y=5大家来帮忙啊,最好多列几道,还有写出过程啊,
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x-2y=3、2x-3y=5大家来帮忙啊,最好多列几道,还有写出过程啊,
大家会的来帮忙解方程 25x²-10x+1=9; 4(2y-1)²=9(3y-1)².这两题用直接开平方法3(x-4)²=2x-8 (x-根号3)²=5(根号3-x) 这两题用因式分解法解. 会的大哥大姐们快来帮帮忙啊~~~~
帮忙来解二元一次方程组!3x-2y=1,2x+3y=-7
[(x+y)(x-y)]^3 × [(x+y)^2]^2×[(x-y)^3]^2=?大家迅速点好么=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
微分方程的问题4xy+2x+(2x^2+3y^2)y'=04xy+2yx^2+(2x^2+3y^2)y'=02cos(x+y)-2xsin(x+y)-2xsin(x+y)y'=01/x+y+(3y^2+x)y'=0y+e^x+xy'=03y^4-1+12xy^3y'=0麻烦大家帮忙做下这几道微分方程,
请大家帮忙写一道二元一次方程加解{5x+4=y{6(x-2)=y
有几道数学题,大家帮忙看一下(1)若3|x-2|+|y+3|=0,则x分之y的绝对值是多少?(2)若|x+3|+“(y-1)的二次方”求y-x分之-4的n次方.(3)如果x,y表示有理数,且,x,y满足条件|x|=5,|x-y|=y-x,那么x+y的值
帮忙解一些方程组(1)3x-2y=6 2x+3y=17 (2)5x+6y=15.2 3x-2y=-0.4(3)2(x+y)-3y=7 4(x-9)=3(y-2)(4)3(x+y)-4(x-y)=4 x+y/2+x-y/6=1
请大家帮忙写三道二元一次方程加解,(1){y=2x-1 (2){2x-3y=4 (3){3x-2y=5 {7x=3y+1 {3x-y=-1 {4x+3y=1
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
已知(x+2)*+|y+1|=0求5xy*-{2x*y-【3xy*-(4xy*-2x*y)】}的值帮忙啊!谢谢!
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5