Question 776905
Let father's and daughter's age be x and y years respectively now.


Now:
xy = 430 ________ (1)


3 years before:
x - 3 = 4y
x = 4y + 3 ________ (2)


Substituting x from (2) into (1)
{{{(4y + 3)y = 430}}}
{{{4y^2+3y-430=0}}}


Solve this equation to find y
*[invoke quadratic "y",4, 3, 430 ]


Imaginary roots suggest that this is impossible. Check and ensure that the data for the question is correct.