Question

If -1 and 2 are two zeroes of the polynomial 2
³−
² − 5 − 2 find its third zero.​

Answer 1

Answer:

So, α=

5

,β=−

5

,γ=?

∴α+β+γ=−

a

b

∴

5

+(−

5

)+γ=−1

∴γ=−1

Therefore, the third zero is −1.