Question

Factorize

$x^2-40x+397=0$

Answer 1

Factorizing we get,

$x^2-40x+39=0$

$\Rightarrow x^2-39x-x+39=0$

$\Rightarrow x(x-39)-1(x-39)=0$

$\Rightarrow (x-1)(x-39)=0$

$\Rightarrow x=1,39$