因式分解:8+X³/27=_______
问题描述:
因式分解:8+X³/27=_______
答
8+X³/27=2³+(x/3)³=(2+x/3)(4-2x/3+x²/9)
答
8+X³/27=8+(x/3)³=(2+x/3)(2^2+2x/3+x^2/9)=(2+x/3)(4-2x/3+x^2/9)
答
8+x^3÷27
=2^3+(x/3)^3
=(2+x/3)[2^2-2*x/3+(x/3)^2]
=(2+x/3)(4-2x/3+x^2/9)