Identify Sum of Cubes: Identify the denominator as a sum of cubes: x3+y3=(x+y)(x2−xy+y2). Calculation: x3+y3=(x+y)(x2−xy+y2).
Simplify Expression: Simplify the original expression by substituting the identified forms: (x+y)3/(x+y)(x2−xy+y2).Calculation: (x+y)3/(x+y)(x2−xy+y2)=(x+y)2.
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