Question

Solve:

$x^2-7x-60=0$.

Answer 1

Now,

$x^2-7x-60=0$

or, $x^2-12x+5x-60=0$

or, $x(x-12)+5(x-12)=0$

or, $(x-12)(x+5)=0$

or, $x=12,-5$.