Question

solve the following with identity
45^3-25^3-30^3

Answer 1

Answer:

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Answer 2

45³ - 25³ - 30³

a³-b³ = (a-b) (a² + ab + b²)

➪ (45³- 25³) - 30³

➪ (45-25) (45² + 45×25 + 25²) - 30³

➪ 20 (2025 + 1125 + 625) - 30³

➪ 20 (3775) - 30³

➪ 75500 - 30³

➪ 75500 - 27000

➪ 48500.