Question

( 5m + 3n ) ( 5m - 3n) = 25m²-..........​

Answer 1

Step-by-step explanation:

( 5m + 3n ) ( 5m + 3n )

{ (a+b) (a-b) } = a^2 - b^2

so ,

(5m)^2 - (3n)^2

= 25m^2 - 9n^2

hope it helps you ☺️

plzz mark my answer as brilliantest plzzz

Answer 2

Answer:

(5m+3n) (5m-3n)

{(5m×5m) (5m) ×(-3n)} ({3n) ×(5m) (3n) ×(-3n)}

25m2 + (-15mn) + (15mn) -9n2

25m2-9n2