(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2
(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2
(x的次方一X十4)X一(X一1)(x的次方十2)=x十7
(X十2)(X一13)一16=(X十3)( )
分解因式(x十1)(x十2)(x十3)(x十6)一3x'2;3x(3x一2)一a(a十2)
(2X一)(X十3)=3X十5
化简求值:(X一3)(X一2)十(X一1)(X十3)一2(X平方一X十8)(其中X=6).
解方程 (1)4X^2一4X十1=8 (2)X^2十X一1=0 (3)X^2十6分之一x一3分之一=0
a,b为常数,f(X)=X^2十4X十3,f(aX十b)=X^2十10X十24,则5a一b=?
(X十y)的平方一2X一2y十1分解因式
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)=
已知2X一3y一4=0,求(2X一3y)一4X十6y十7的值
(x十2)(x的2次方-X十1)一(X-1)(x的2次方十2x一3),其中x=2