Question

( 2x + 3 ) ( 2x -3) -( 2x + 1 )²

Answer 1

`(2x+3)(2x-3)-(2x+1)^2`

`=4x^2 - 9 - 4x^2 - 4x -1`

`=-4x -10`

Answer 2

\(=4x^2-9-\left(4x^2+4x+1\right)\)

\(=4x^2-9-4x^2-4x-1\)

\(=4x^2-4x^2-4x-9-1\)

\(=-4x-10\)

Answer 3

\(\left(2x+3\right)\left(2x-3\right)-\left(2x+1\right)^2\)

\(=4x^2-9-\left(4x^2+4x+1\right)\)

\(=4x^2-9-4x^2-4x-1\)

\(=\left(4x^2-4x^2\right)+\left(-9-1\right)-4x\)

\(=-10-4x=-4x-10\)