Question

Rewrite 9x + 81 using a common factor.

9x(x + 81)
9x(x + 9)
9(x + 81)
9(x + 9)

Answer 1

9 ( x + 9 )

Explanation:

81 = 9 × 9

9x = 9 × x

9x + 81 = 9 ( x + 9 )