Question

How do you factor completely `3x^2 + 12x + 9`?

Answer 1

3(x+1)(x+3)

Explanation:

3x^2+12x+9
=3(x^2+4x+3)
Use{ cross product method}
1 3
1 1
x^2+4x+3=(x+1)(x+3)
So
3(x+1)(x+3)#