X^2-12X+36,求XX^2-12X+36=0 不好意思，呵呵

X^2-12X+36,求XX^2-12X+36=0 不好意思，呵呵 y=log5(x*x-4x-12)求它的定义域 xx-4x-12>0 (x-6)(x+2)>0 => x>6 或 x 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-7 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-708） 7/xx+x+1/xx-1=2/xx-x 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 已知XX+X+1=0,求XXX+2XX+2X+3的值 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值 已知函数f(x)满足f(2x+1)=xx+x,求f(x) 已知xx+yy+4x-6y+13=0,求（xx-2x）/xx+3yy的值. 因式分解(X+2)(X+3)+XX-4 a-x/xx-x-2>0咋解 4x^2-1=12xX(X-7=8(7-X) 已知XX-11X+1=0,求下列各式:(1)X+1／X(2)XX+1／XX(3)XX／XXXX+1XX-11X+1=0的意思X乘X减11X加一等于0(1)X+1／X的意思是 X加1分之X(2)XX+1／XX X的平方加1分之X的平方(3)XX／XXXX+1 X的平方分之X的四次方加1 若xx+x-1,求xxx+2xx+99的值是若xx+x-1=0,求xxx+2xx+99的值 xx+12*12=yy(y-x=2)