Question

1. (x - 3) (x + 3) +9
2. (a+b) (c-d) + (a-b) (c+d) +2 (ac+bd)​

Answer 1

Step-by-step explanation:

1. (x-3)(x+3) +9 = x^2-9 +9

= x^2

2. i think the answer will be 4ac