Question

factorise $x^{3}+13x^{2}+32x+20$

Answer 1

Answer:

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

Step-by-step explanation:

Step 1:

equation at the end of the step 1

(((x3+13x2) + 32x) + 20

Step 2:

Checking for a perfect cube:

2.1 x3+13x2+32x+20

Thoughtfully split the expressions at

hand into groups,each groups having 2 terms:

Group 1: x3+13x2

Group 2: 32+20

Pull out from each group separately:

Group1: (x+13) . (x2)

Group2: (8x+5) . (4)