分解因式:x3-4x=___.
x(x+2)(x-2)
此题考查平方差公式在分解因式中的应用
思路分析:将原式提出公因式x,再用平方差公式展开即可
解:原式=
答案:x(x+2)(x-2)
As parents and teachers, you should allow children the space to ________ their opinions, even if they are different from your own.
A.announce
B.voice
C.declare
D.sound
硬吹是指()的吹炼模式。
A.枪位低或氧压高
B.枪位较高或氧压较低
C.枪位低或氧压低