(x十3)(x一3)十8>(x十5)(x一1)解不等式
x*2一3x十1=0则x*4十x*一4二多少
1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)=
解方程:(x一3)(x十1)=x(2x十3)一(x的平方十1)
计算:/3一x/十/x一1/(x>5)
2x一3y二m一4.3x十4y二m十5 .2x十3y二3m一8
X.(X十1)x(X十2)x(x十3) =360
已知x^2一5x十1二0,求x^4十1/x^4的值
7(2x一1)一3(4x一1)二4(3x十2)一1
3x十7x十5x一7x=17十18
计算:6x2一(2x一1)(3x一2)十(x十2)(x一2)一x(x十7)这题怎么做?
7X十1二3X-3