Question

14. If 1 and -2 are two zeros of the polynomial (3x³– 4x² - 7x + 10), find its third zero.​

Answer 1

Answer:

7/3

Step-by-step explanation:

let the other zero be α

3x³– 4x² - 7x + 10 = 0

we know that α+β+γ = -b/a = 4/3

if two zeros are 1 and -2

1 + -2 + α  =  4/3

-1 + α = 4/3

α = 4/3+1

α = 7/3