Question

Which factor do 9x2 – 12x + 4 and 9x^2 – 4 have in common?

Answer 1

Answer:

3x-2

Step-by-step explanation:

$9x^{2} -12x+4$ can be factored using the perfect square rule into $(3x-2)^{2}$

and

$9x^{2}-4$ can be factored by using the difference of squares formula into $(3x+2)(3x-2)$

Both can be factored by (3x-2) so it is a common factor.