Question

V-1)
Exercise 28C
Factorise:
1. 9x3 + 18x2 + x + 2​

Answer 1

Answer:

$9x^3 + 18x^2 + x + 2$=  $(x + 2)(9x^2 + 1)$

Step-by-step explanation:

Given:

$9x^3 + 18x^2 + x + 2$

Find common between first two and last two numbers

$9x^2 (x + 2) + 1( x + 2)$

Now take (x +2) common

$(x + 2)(9x^2 + 1)$

So,$9x^3 + 18x^2 + x + 2$ =  $(x + 2)(9x^2 + 1)$