Question 279912
sqrt(x+31)=x+1

x+31= (x+1)^2

x+31= x^2+2x+1

x^2+x-30=0

x^2+6x-5x-30=0

x(x+6)-5(x+6)=0

(x+6)(x-5)=0

x=-6 or 5