1.

(2) (7x + 8y)

Answer»

(7x + 8y)³

(7x)³ + (8y)³ + 3×(7x)×(8y) ( 7x + 8y)

343x³ + 512y³ + 168xy ( 7x + 8y)

343x³ + 512y³ + 1176x²y + 1344xy²



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