Question

expand using identity (y-5) (y+5)​

Answer 1

Answer:

y² - 25

Step-by-step explanation:

use identity a² - b² = (a + b) (a - b)

=> y² - 5² = y² - 25

Answer 2

Answer:

(y-5)(y+5)=y^2-5^2

hope my answer will help you