Question 167503
square root of 5x+11=  x+3

5x+11= (x+3)^2 = x^2 + 9 +6x
5x+11 = x^2 + 6x+ 9
x^2 + x - 2 = 0
x = 1 or x=-2

(solve the quadratic equation and use the formula
x = (-b+-sqrt(b^2-4ac))/2a