x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
x²-3x+2=0 x²-3x+(3/2)²-(3/2)²+2=0 然后怎么算?
已知f(x)={x/2,x>=0 -x²+3x,x=0
x²+3x-2=0怎么算
x²-3x+2=0怎么算?
f(x)=x²+3x|x-2|
解方程(x²-3x)/(x²-1)+(2x-1)/(x-1)=0
已知集合A={x|-x²+2x+3>0},B={x|x-2
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
x²+3x(3x)²/(2x)²+2x²怎么算?
(2x+1)²-(x+3)(3-x)=6x怎么简便算?
3X²-(X+2)²+2X=0
①2(x+3)(x-3)=x²+(x-1)(x+1)+2x