Question

Factorise: -
x3 + 13x² + 324+20​

Answer 1

Answer:

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

Note: Please check the question for the x coefficient

Step-by-step explanation:

x3 + 13x² + 32x+20​

= x3 +(x² + 12x² )+ (12x+20x)+20​

= x²(x+1)+12x(x+1)+20(x+1)

= (x+1)[x²+12x+20]

= (x+1)[ x²+(2x + 10x)+20]

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

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