x^3-11x^2+31x-21
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
关于x的不等式(x+21)/2>3-x,x
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
(x^21+x^15+x^12+x^9+x^6+x^3+1)/(x^2+x+1)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
2道因式分解的数学题 ① X^4+64 ②X^3-11X^2+31X-21
x^2-3x
(x+3)(x-2)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6),