Question

I want the factor of x×x-x-420

Answer 1

The given equation is :-

=) x^2 -x-420

so using middle term splitting rule,

we can write this given equation as:-**

=) x^2 - 21x +20x - 420

taking common,

= x(x-21) +20(x-21)

= (x-21)(x+20)

so,

=) x^2 -x - 420 = (x-21)(x+20)

so this equation has two factors...
(x-21) and (x+20) ans...