Question 166806
log5(x^2+x+4)=2
x^2+x+4 = 5^2
x^2+x+4 = 25
x^2+x-21 = 0
Since we can't factor, we must use the quadratic equation.  
Doing so will yield:
x = {4.110, -5.110}
.
*[invoke quadratic "x", 1, 1, -21 ]