Question

find (2y+5)²-(2y-5)²​

Answer 1

Answer:

formula used :(a²-b²)=(a+b)(a-b)

Step-by-step explanation:

hope it helps you

Answer 2

Answer:

HOPE YOU WILL LIKE MY ANSWER

Step-by-step explanation:

(2y+5)²-(2y-5)²

=> (a+b)^2 - (a-b)^2

=> a^2 + 2ab + b^2 - ( a^2 - 2ab + b^2 )

=> (2y)^2 + 2.2y.5 + (5)^2 - { (2y)^2 - 2.2y.(5) + (5)^2 }

=> 4y^2 + 20y + 10 - { 4y^2 - 20y + 10 }

=> 4y^2 + 20y +10 - 4y^2 + 20y - 10

=> 40y