x2+4x-2＝05x(3x+2)＝6(3x+2) 

x2+4x-2＝05x(3x+2)＝6(3x+2)  已知x2 3x-2＝0,求2x-4╱x2 6x 9÷（x-3）×x2-9╱2x-x2的值 (x-x2)(x2+x-6)分之(x2+3x)(x2-3x+2) (x2+2x-3)(x2+2x+4)+6因式分解 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 (-2x)*(x2-5x+6)-4x(2x2-3x+1) (x2-3x)2-x(x2-3x)-2x2 x2-4x+3分之x2-5x+6+s2-2x+1分之x2-4x+3+1-x2分之x2-3x-4的过程 1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21x2是x的平方 通分 3x/x2-2x,2x+1/4-x2,3/2x2+4x 3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x x2+3x+2分之x-1减去x2-x-2分之6减去x2-4分之x-10x-1/x2+3x+2减去6/x2-x-2减去x-10/x2-4 约分x2+x-2/x2-x-6 (x2-x)2+6(x2-x)+9 (x+1)(x2-x+1)+(x-2)(x2+2x+4),其中x=-3/2 1.(x2-4x+3)(x+2) 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x x2＋2x-3＝7,则2x2+4x-17=