Question

write the identities used in the following expressions:​

Answer 1

Answer:

This identity use in this question.

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

(2xy+5y)^2=4x^2y^2+25y^2+20xy^2 ans

Answer 2

Answer:

SO HERE IS YOUR ANSWER...

(a+b)² = a² + b² +2ab

Step-by-step explanation:

Here ... ANSWER=

(2xy + 5y)² = (2xy)² + (5y)² + 2.2xy.5y

= 4x²y² + 25y² + 20xy²

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