Question

1) Use a suitable identity to get the product :

(4m + 5n) (4m - 5n)​

Answer 1

Answer:

$(4m + 5n)(4m - 5n)$

$according \: to \: {a}^{2} - {b}^{2} = (a - b)(a + b)$

$(16 {m}^{2} - 25 {n}^{2} )$

Answer 2

Answer:

Answer:(4m)² - (5n)² =(4m + 5n)( 4m - 5n)