Question

(5ab-4cd) ^2 expand the following

pls answer it fast​

Answer 1

Answer:

25a²b²+16c²d²-20abcd

Step-by-step explanation:

(5ab-4cd)²

25a²b²+16c²d²-20abcd

Answer 2

Step-by-step explanation:

this is in the form of (a-b)^2 = a^2-2ab+b^2

a = 5ab, b = 4cd

= (5ab)^2 - 2(5ab)(4cd) + (4cd)^2

= 25a^2b^2 - 40abcd + 16c^2d^2

Hope this helps