Question

Factor the equation 45x - 81

Answer 1

9(5x-9)

Explanation:

1 Find the Greatest Common Factor (GCF).

GCF =9

Answer 2

Explanation:

45x = 9*5*x

81 = 9*9

GCF = 9

Take 9 out using distributive property { a*b - c*b = b*(a-b)}

45x - 81 = 9*5x - 9*9

= 9*(5x - 9)

=9(5x-9)