the value of 2 X + 3 y whole square + 2 x minus 3 ywhole square is dash
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(2x+3y)^2. + (2x-3y)^2
(a+b)^2 + ( a-b)^2
=(4x^ 2 + 9y^2 + 12xy ) + ( 4x^2 + 9y^2 - 12xy)
=8x^2 + 18y^2
(a+b)^2 + ( a-b)^2
=(4x^ 2 + 9y^2 + 12xy ) + ( 4x^2 + 9y^2 - 12xy)
=8x^2 + 18y^2
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