Question 206727
For a product to equal zero, one of both term must be 0
{{{(2x+5)(3x-4)=0}}}
So either
{{{2x+5 = 0}}} or {{{3x-4= 0}}}
This x can be either
{{{2x+5 = 0}}}
{{{2x = -5}}}
{{{x = -5/2}}}

OR
{{{3x-4 = 0}}}
{{{3x = 4}}}
{{{x = 4/3}}}

See the plot here --> http://www.wolframalpha.com/input/?i=(2x%2B5)(3x-4)%3D0