a^3 - 125 - 2a + 10
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Answer: (a - 5)(a² + 5a + 23)
Step-by-step explanation:
a³ - 125 - 2a + 10
⇒ a³ - 5³ - 2a + 10
⇒ (a - 5)(a² + 5a + 25) - 2(a - 5) [∵ a³ - b³ = (a - b)(a² + ab + b²)]
⇒ (a - 5)(a² + 5a + 25 - 2) [taking (a - 5) common]
⇒ (a - 5)(a² + 5a + 23)
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