你可能感兴趣的试题
x=y2+1 y=2x2+1 x-2y=6 x=
-x>-y a2x>a2y -x+a<-y+a x>-y
3x+5y=8xy 3y2-y2=3 15ab-15ba=0 7x3-6x2=x
x+4>y+4 x-4>y-4 -4x>-4y -<-
(x-1)(x-2)=x2-3x+2 x2-3x+2=(x-1)(x-2) x2+4x+4=x(x一4)+4 x2+y2=(x+y)(x―y)
∑(X-) ∑(Y-) ∑(Y-) ∑(X-)(Y-) ∑(Y-)
y Mod 4 And y Mod 100 Or y Mod 400 y Mod 4 =0 Or y Mod 100 < >0 And y Mod 400 =0 y Mod 100 < >0 And(y Mod 4 =0 Or y Mod 400 =0) y Mod 4 =0 And y Mod 100 < >0 Or y Mod 400 =0
x+4>y+4 x﹣5<y﹣5 6x>6y ﹣3x<﹣3y
x﹣2>y﹣2 x+1>y+1 ﹣5x>﹣5y >
(x-1)(x-2)=x2-3x+2 x2-3x+2=(x-1)(x-2) x2+4x+4=x(x一4)+4 x2+y2=(x+y)(x―y)
∑(X-)2 ∑(Y-)2 ∑(Y-)2 ∑(X-)(Y-) ∑(Y-Y)2