y=x^2 -4x=x^2+5x=( )^2=( )

y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 y=(x^2+x)/(x+1) 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-( 已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y* 数学题……555{(3x+y)(3x-y)-(x-5y)(5x-y)-(x-2y)²÷(-4x),x=-2.y