Question 668259
Multiply by 16 to rid the equation of fractions.
{{{(2cross(16))(7/1cross(8))x^2 - (4cross(16))(3/1cross(4))x + (1cross(16))(5/1cross(16)) = 0}}}
...
{{{14x^2 - 12x + 5 = 0}}}

*[invoke quadratic_formula 14, 12, 5, "x"}