将多项式x4+2x2-3分解因式,结果正确的是(  ) A.(x2+3)(x2-1) B.(x2+1)(x2-3) C.(x2+3)(x-1)(x+1) D.(x2+1)(x-3)(x+3)

问题描述:

将多项式x4+2x2-3分解因式,结果正确的是(  )
A. (x2+3)(x2-1)
B. (x2+1)(x2-3)
C. (x2+3)(x-1)(x+1)
D. (x2+1)(x-3)(x+3)

x4+2x2-3=(x2+3)(x2-1)=(x2+3)(x-1)(x+1).
故选C.