Final answer:
The given equation is not a standard quadratic form and therefore cannot be solved using the quadratic formula. Identifying all true solutions would require numerical methods or additional context, which is not provided.
Step-by-step explanation:
The student's question deals with finding true solutions for the equation (3^x + 2 - x^{x+4} = 0). However, this equation does not resemble a standard quadratic form (ax^2 + bx + c = 0), and therefore cannot be solved using the quadratic formula as provided in the references. Instead, such an equation would typically require numerical methods or specific contextual constraints to execute an accurate solution. Moreover, the provided references seem to be about standard quadratic equations, which do not apply to the equation in question. Without further context or information on the nature of the equation's variables or any special properties it might have, it is not possible to identify all true solution(s) accurately. Higher-level mathematics or a specific context provided by the curriculum might suggest methods for approximation or special techniques suited to this form of an equation.