(2x-5)²=9 4x²-(x-1)²=0
(x+4)(3x+6)=2x+4 (3x- 1)²+4x²=0 x²+5=2根号6x-1
(x-2)²=(2x-3)² x²-4x=0 3x(x+1)=3x+3 x²-2
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
9x+6x²-3(x-2/3x²),其中x=-2 1/4(-4x²+2x-8)-(1/2x
计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
计算 (5x-2)(x-3)-(3x-1)(x-4)= (x+3)(x²+9)(x-3)=
x²+3x-1=0,1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
已知X不等于0,且M=(X²+2X+1)(X-2X+1),N=(X²+X+1)(x²-X+
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)