Question

Factorise: ׳+13ײ+32×+20​

Answer 1

The value of x3+13x2+32x+20 is

x3+x2+12x2+12x+20x+20

=x2(x+1)+12x(x+1)+20(x+1)

=(x−1)(x2+12x+20)

=(x−1)(x2+10x+2x+20)

=(x+1)[x(x+10)+2(x+10)]

=(x+1)(x+2)(x+10)