Question

Write as a product.
(5c-3d)²-9d²

Answer 1

= 25c² - 30cd

Explanation:

(5c-3d)²-9d²

`(5c - 3d)(5c - 3d) - 9 {d}^(2) \\ 5c(5c - 3d) - 3d(5c - 3d) - 9{d}^(2) \ \\ 25 {c}^(2) - 15cd - 15cd + 9 {d}^(2) - 9 {d}^(2) \\25 {c}^(2) - 30cd`

Answer 2

the answer is 25c²

Explanation:

(5c-3d)²-9d²

5²c²+3²d²-9d²

25c²+9d²-9d²

25c²