Question

Factories ( 100 - 9a² )​

Answer 1

Answer:right answer:   (10+3a)(10-3a)

Step-by-step explanation:

10²-(3a)²=(10+3a)(10-3a)

Answer 2

$(100 - 9 {a}^{2} ) \\ = {10}^{2} - (3 {a})^{2} \\ = (10 + 3a)(10 - 3a)$