\[4\left( 2 - x^{2} \right) - 3x(x - 3) =\]
\[= 8 + 9x - 7x²\]
\[8 - 4x^{2} - 3x^{2} + 9x =\]
\[= 8 + 9x - 7x^{2}\]
\[8 = 8\]
\[Ответ:x - любое\ число.\]