x3-1因式分解X3-1如何因式分解

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x3-1因式分解X3-1如何因式分解x3-1因式分解X3-1如何因式分解x3-1因式分解X3-1如何因式分解X^3-1=X(X^2-1)+(X-1)=X(X+1)(X-1)+(X-1)=(X-1)(X

x3-1因式分解X3-1如何因式分解
x3-1因式分解
X3-1如何因式分解

x3-1因式分解X3-1如何因式分解
X^3-1
=X(X^2-1)+(X-1)
=X(X+1)(X-1)+(X-1)
=(X-1)(X^2+X+1)

原式=(X-1)(X平方+X+1)

X3-1
=(x-1)(x^2+x+1)