Question 302361
{{{3x^2 - 7x -20 = 0}}}
{{{(3x+5)(x-4)=0}}}

Therefore, 

3x+5 = 0 , {{{x = -5/3 = - 1 (2/3)}}}

or 

x - 4 = 0, x = 4 

Answer: {{{x = -1 (2/3)}}} or x = 4