Question

(x+y)^3-(x-y)^3 is equal to
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Answer 1

Answer:

Step-by-step explanation:

(x+y)3+(x−y)3=(2x)(x2+3y2). Explanation: (x+y)3+(x−y)3. Think about Pascal's Triangle to expand these terms: =(x3+3xy2+3x2y+y3)+(x3+3xy2−3x2y−y3).