Question

Factorise : (5b - 4)^2 - (5b + 4)^2.​

Answer 1

Answer:

b=0

HOPE SO THIS WILL HELP U

Answer 2

Answer:

-80b

Step-by-step explanation:

using the formula (a+b)(a-b)=a^2 - b^2

here (5b-4)^2 is a^2 and (5b+4)^2 is b^2

hope it works...