Question

GURU was born in AD 1809. in the year x2AD he was x-3 years old. find the value of x

Answer 1

$x^2-1809=x-3\to x^2-x-1806=0\to x^2-43x+42x-1806=0\to x(x-43)+42(x-43)=0\to x=43or-42\to x=\mathrm{43....}$