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
(x2+3x+9)/(x2-27)+(6x)/(9x-x2)-(x-1)/(6+2x)
先化简,再求值:x(x2-6x-9)-x(x2-8x-15)+2x(3-x),其中x=−16
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
x2+﹙1/6﹚x-1/3=0②x2-2x=3③x2-4x-2=0④-2x²-x+7=0⑤3x²-x
1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=1/(x+4)
先化简,再求值:2x2-5x+x2+4x-3x2-2,其中x=12
1.2-5x+x*x2.2x*x-5x+13.x*x-3/2*x-24.-x*x-4x+3
x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x 化简
化简x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x
解方程 x(x-6)+2x(x-3)=3(x2-x-1) 解不等式:2x2(x-3)+4(x2-x)≥x(2x2-2x+