Question

(4a+5b) (4a-5b)
find the product​

Answer 1

Answer:

16a² - 25b²

Step-by-step explanation:

(4a + 5b) × (4a - 5b)

[(a + b) × (a - b) = a² - b²]

(4a)² - (5b)²

16a² - 25b²

Answer 2

Answer:

using identity (a+b) (a-b)=a²-b²

(4a+5b)(4a-5b)= (4a)²-(5b)²

⇒(4a)²-(5b)²

⇒16a²-25b²

Step-by-step explanation:

hope it helps