Question

evaluate by using suitable identities (45)^2​

Answer 1

Answer:

it can be (40+5)'2 or it can be (50-5)'2

So I'm going to solve both so you can understand

Firstly (40+5)'2

Required Formula:(a+b)'2 = a'2+2ab+b'2

So

(40)'2+2(40)(5)+(5)'2

1600+400+25

2025 is the answer

Similarly,,

(50-5)'2

Required Formula :(a-b)'2=a'2+2ab+b'2

So (50-5)'2

(50)'2-2(50)(5)+(5)'2

2500-500+25

2525-500

2025

I hope so you find answer

Please give my answer as a brainist