Question

factorise x3 + 13x²+32 x+20​

Answer 1

$x^3+13x^2+32x+20\\=(x+1)(x^2+12x+20) \\(for x=(-1), x^3+13x^2+32x+20=-1+13-32+20=0 )\\=(x+1)(x^2+10x+2x+20)\\=(x+1){x(x+10)+2(x+10)}\\=(x+1){(x+10)(x+2)}\\=(x+1)(x+2)(x+10)$

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Answer 2

Answer:

your answer is:

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