Write a quadratic equation whose solutions are - 1/3 and 4

(3x + 1) (x - 4) = 0

Step-by-step explanation:

In factor form the equation is (x - (-1/3)) (x - 4) = 0

= (x + 1/3) (x - 4) = 0

Now lets get rid of the fraction by multiplying (x + 1/3) by 3:-

(3x + 1) (x - 4) = 0 (answer)