156k views
3 votes
6: Find the equation of a polynomial with given zeros:

6: Find the equation of a polynomial with given zeros:-example-1
User Patlatus
by
3.0k points

1 Answer

1 vote

The given zeros are - 5/4, - 2/3, 2

We would find the factors

For x = - 5/4,

4x = - 5

4x + 5 = 0

For x = - 2/3,

3x = - 2

3x + 2 = 0

For x = 2,

x - 2 = 0

We would multiply the factors. We have

(4x + 5)(3x + 2)(x - 2)

By applying the distributive proerty of multiplication, we vae

(4x + 5)(3x + 2) = 12x^2 + 8x + 15x + 10

(4x + 5)(3x + 2) = 12x^2 + 23x + 10

(x - 2)(12x^2 + 23x + 10) = 12x^3 + 23x^2 + 10x - 24x^2 - 46x - 20

(x - 2)(12x^2 + 23x + 10) = - 24x^2 = 12x^3 + 23x^2 - 24x^2 + 10x - 46x - 20

= 12x^3 - x^2 - 36x - 20

The first option is correct

User Mohsen Fallahi
by
3.5k points