Question

factorise-
i) x^3+13x^2+32x+20
II)x^3+x^2-x-1
III)x^3+x^2+x+1

Answer 1

Answer

i)x³+13x²+32x+20 =(x+1)(x²+12x+20) =(x+1)(x+2)(x+10)

ii)x³+x²-x-1 =(x-1)(x²+2x+1) =(x-1)(x+1)(x+1)

iii)x³+x²+x+1 =(x+1)(x²+1)