Question

Va rog! Dau CORONITAA!
Calculati:
$(2x-3)^{2}+(2x+3)^{2}-2(2x-3)(2x+3)$

Answer 1

$4x^{2}-12x+9+4 x^{2} +12x+9-2(4 x^{2} -9) =8 x^{2} +18-8 x^{2} +18= \\ =36$

Answer 2

$4x^{2}-12x+9+4x^{2}+12x+9-2(4x^{2}-9)$
$4x^{2}-12x+9+4x^{2}+12x+9-8x^{2}+18)$
$9+9+18$
$36$