Factors of x³ − x²y − xy² + y³

Factors of x³ − x²y − xy² + y³

The factors of \[ x^3-x^2y-xy^2+y^3 \] are

(a) \((x+y)(x^2-xy+y^2)\)

(b) \((x+y)(x^2+xy+y^2)\)

(c) \((x+y)^2(x-y)\)

(d) \((x-y)^2(x+y)\)

Solution

\[ x^3-x^2y-xy^2+y^3 \]

\[ =x^2(x-y)-y^2(x-y) \]

\[ =(x-y)(x^2-y^2) \]

\[ =(x-y)^2(x+y) \]

\[ \boxed{(d)\ (x-y)^2(x+y)} \]

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