Question 331693
let daughter's age be x now.
after 3 years daughter will be x+3
..
after 3 years Janice will be 3*(x+3) years
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6 years ago daughter's age = x-6.
janice ' age was  (x-6)^2
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3x+9-9 =3x
3x= (x-6)^2
3x=x^2-12x+36
x^2-15x+36=0
x^2-12x-3x+36=0
x(x-12)-3(x-12)=0
(x-12)(x-3)=0
x=12 OR 3

After 3 years Janice will be x(x+3) 
plug value of x 
3(12+3)=45
So now Janice  will be 45-3 = 42 years ( this makes sense)

..
For value x=3
3(x+3)
plug value of 3
3(3+3)= 18 This was 3 years later
now she will be 15