Question 843273
*[invoke quadratic_formula 1, 1, 7, "x"]


note: those solutions are of the form {{{a+bi}}}. In the first case, {{{a = -1/2}}}, {{{b = 3*sqrt(3)/2}}}
In the second case, {{{a = -1/2}}}, {{{b = -3*sqrt(3)/2}}}