Question

How do i find all of the zeros for the equation: 3x^3-x^2-15x+5=0.

Answer 1

You can try using the general formula for finding the roots of cubic functions, which is not trivial :( Instead, you can try to factor it :D

Answer 2

so how would i factor a cubic number? i know how to factor a quadratic equation.

Answer 3

i mean cubic equation.

Answer 4

3x^3-x^2-15x+5
= 3x^3-x^2 -15x+5
=3x^3-x^2 -(15x-5)
=x^2(3x-1) - 5(3x-1)
=(x^2-5)(3x-1)

Answer 5

Ok THANK YOU SOO MUCH!!!

Answer 6

You're welcome! :)