Verified answer

Bonjour,

[tex]A=(4x-3)^2-(4x-3)(2x+1)\\A=(4x)^2-2*4x*3+3^2-(8x^2+4x-6x-3)\\A=16x^2-24x+9-8x^2-4x+6x+3\\A=8x^2-22x+12[/tex]

A=(4x − 3)² – (4x − 3)(2x + 1)

=4x²–2*4x*3 +3² –(4x − 3)(2x + 1)

=4x²– 24x + 9– 4x*2x+4x*1–3*2x–3*1

=4x²–24x+9–8x²+4x–6x–3

=– 4x²– 26x+6

voilà