Cálculo de tir y VPN, en calculadora científica Casio fx

Here's the problem statement and how to do it without trial and error.    • Tasa interna de retorno, TIR, tasa de rent...   Here's the VPN problem.    • Valor actual neto, valor presente neto, VA...   Short and simple explanation for beginners, high school students, and college students. I welcome voluntary donations at paypal.me/matematicaFYM