Question

4x² +9y² + 12xy - 1​

Answer 1

By using the formula

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

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

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

=> ( 2x - 3y )^2 OR

=> ( 2x - 3y ) ( 2x - 3y ) - 1