建筑1米线和结构1米线
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因式分解:81(x+y)^2-9(2x-3y)^2 详细过程
因式分解:2x^2+3xy-9y^2+14x-3y+20 x^4+5x^3+15x-9
(2x+y)(2x-3y)+x(2x+y) 因式分解8^2(2x^2-y^2)+y^4 3x^2-27
若(2x-3y+5)^2+|x+y-2|=0,则x= y=
2x+1=2-x 咋算 2(x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/62x+1=2-x 2(x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/6
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
有这样一道题:“计算(2x^3-3x^2y-2xy^2)-(x^3-2xy^2+y^3)+(-x^3+3x^2y-y^3)的值,有这样一道题:"计算(2x^3-3x^2y-2xy^2)-(x^3-2xy^2+y^3)+(-x^3+3x^2y-y^3)的值,其中x=1/2,y=-1"甲同学把“x=1/2”错抄成“x=-1/2”但他计
计算:(3x^2-2y^2)-(-x^2+2xy+y^2)-(x^2-4xy+3y^2)
计算(2X^3-3X^2Y-2XY^2)-(x^3-2xy^2+y^3)+(-x^3+3x^2y-y^3)的值,其中,x=1/2,y=1
(-1/2y+2x)(3/2x-2/3y+1)计算
计算2x-2[2(x+3y)-3(x-2y)]
(-3x-2y)(-3x-2y)用乘法公式计算
怎么计算:1.(x-2y+z)(-x+2y+z) 2.(2x-3y-1)(2x+3y-1)
2x+2y分之3y+x方+xy分之2xy
3y/2x+2y+2xy/x^2+xy
2x+2y分之3y+x^2+xy分之2xy
计算;(3x-2y)(2x-3y)-2a^2(1/2ab+b^2)-5a(a^2b-ab^2)-x^2(2y^2-xy)
计算[-(-2x^2y)^3]^2·(-3x^3y^2)计算(1) [-(-2x^2 y)^3]^2·(-3x^3 y^2)(2) (x^2n-1)^2·(x^2)^3-2n·(-x^2n-3)
3x+2y=6,2x+3y=14如何巧算忘记怎么巧算了= =
计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]3x^2y计算,
计算x+3y/x²-y²+x+2y/y²-x²+2x-3y/x²-y²看不懂的看这个图吧
计算下列各式:①(x+2y+z )² ②(2x-3y-4z)² ③(2x-y+3)²
(1):(x+2y)²-(x+y)(3x-y) (2):(2x+3y)²-(2x-3y)²(3):2a(5a-2分之1b²)-3a(5a-b²) (4):(9x³y²-6xy+3xy²)÷(-3xy) (5):化简求值:(2x+y)²-
﹙2x+3y﹚²﹙2x-3y﹚²-﹙x+2y﹚²﹙x-2y﹚²怎样化简,求过程,数学好的在不在.
(1)3-2分之x-1≤1+3分之x (2)5分之2x+1>3分之x (3)2分之y-3≥3分之2y-1-1 (4)y-2分之3y-8≤7分之2(1解不等式
解方程组(1) x+2y/2=y-x/4=2x+1/3 (2){2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8 如果2x-3y=11-4m
2x+3y=-4 x+1/2y=3已知x/3-y/4=3x+2y-75=3速度要过程
[(x+3y)(x-3y)-6分之1(2x-3y)(3x+6y)]÷(4分之1y)其中x=-2y=8分之1
(1)63Xˇ2+22X-8 (2)Xˇ2+x+6yˇ2+3y+5xy (3)Xˇ3(X-2y)+yˇ3(2x-y)因式分解
4x-(2x+y+16)/2=-6y 2x+3y=7-x-2y4x-(2x+y+16)/2=-6y 2x+3y=7-x-2y求方程组的解
4x-3y/x-2y÷6y-8x/y-2x