Question:উৎপাদকে বিশ্লেষণ কর: `a^3 - a^2 - 10a - 8`
Answer
ধরি, `f(a) = a^3 - a^2 - 10a - 8`
তাহলে `f(-1) = (-1)^3 - (- 1)^2 - 10 (- 1) - 8`
`= - 1 - 1 + 10 - 8`
`= - 10 + 10`
= 0
`:. {a - (- 1)} = (a + 1), f(a)` এর একটি উৎপাদক।
এখন, `a^3 - a^2 - 10a - 8`
`= a^3 + a^2 - 2a^2 - 2a - 8a - 8`
`= a^2 (a + 1) - 2a(a + 1) - 8(a + 1)`
`= (a + 1) (a^2 - 2a - 8)`
`= (a + 1) (a^2 - 4a + 2a - 8)`
`= (a + 1) {a (a - 4) + 2(a - 4)}`
`= (a + 1) (a - 4) (a + 2)`
`= (a - 4) (a + 1) (a + 2)` (Ans)