问题
选择题
把多项式-4a3+4a2-16a分解因式( )
A.-a(4a2-4a+16)
B.a(-4a2+4a-16)
C.-4(a3-a2+4a)
D.-4a(a2-a+4)
答案
-4a3+4a2-16a=-4a(a2-a+4).
故选D.
把多项式-4a3+4a2-16a分解因式( )
A.-a(4a2-4a+16)
B.a(-4a2+4a-16)
C.-4(a3-a2+4a)
D.-4a(a2-a+4)
-4a3+4a2-16a=-4a(a2-a+4).
故选D.
Passage One
According to psychologists, most people buy things ______.
A.to meet their basic needs in life
B.to enjoy spending money
C.for a different reason from the one they claim
D.to satisfy their inexplicable psychological needs