Question:
The sum of two numbers is 48 and their product is 432. Find the numbers.
Solution:
Let first numbers be $x$ and other $(48-x)$
Then according to question
$x(48-x)=432$
$48 x-x^{2}=432$
$x^{2}-48 x+432=0$
$x^{2}-36 x-12 x+432=0$
$x(x-36)-12(x-36)=0$
$(x-36)(x-12)=0$
$(x-36)=0$
$x=36$
Or
$(x-12)=0$
$x=12$
Thus, two number be 36,12