Question

find (2x + 3y)2 , by using suitable identity​

Answer 1

for this u should use the identity (a-b)^2 , that is a^2 - 2 ab + b^2 

               given (2x-3y)^2 

                         (2x)^2 - 2(2x)(3y) + (3y)^2

                          4x^2 - 12xy + 9y^2 

i think your answer is

Answer 2

The identity used here is :-

$\boxed{\bf{\red{(a+b)^{2}=a^{2}+2ab+b^{2}}}}$

Hence,

$(2x + 3y)^{2} = {2x}^{2} + 2(2x)(3y) + {3y}^{2}$

$= > 4 {x}^{2} + 12xy + 9 {y}^{2}$