Question 1029451
Let R=rate at which the bathtub fills;
The bathtub drains at R+2:
1/r-1/r+2=1/15
15(r+2)-15r=r^2+2r
15r+30-15r=r^2+2r
r^2+2r-30=0
Using our quadratic formula, r=sqrt(31)-1
r+2=sqrt(31)+1!!!!!!!!