化简：x2-3x+5

化简：x2-3x+5 5(x2-x)=3(x2+x) 3x2+5x 6x2-[-3x2-(x-1)] 化简 5x2—[x2+(4x—x2)—2(x2—3x)] 化简x(x2-3）+x2（x-3)-3x(x2-x-1) 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 化简:(5x+2x2)+(1–5x–3x2) -2x2-5x+-2x2-5x+3 5x2-8x+5-3x2+6x 用换元法解方程x2-3x+5+6/(x2-3x) (x2-x-3)(x2-x-5)-3因式分解过程 不等式:(x2+3x+3)/(x2+2x+5) (x2+4x-5)(x2+4x+3)最小值 (x2+5x+5)/(x2+5x+6)-(x2+8x+14)/(x2+8x+15)化简 化简1/x2-3x+2 +1/x2-x +1/x2+x +1/x2+3x+2 3x2-5x+3 因式分解 x2-5x+3