[tex] \bf{9 \: x²-12 \: x³+25 \: x-18}[/tex]
[tex] \bf{( 9 - 12) {x}^{2} + 25 \times - 18}[/tex]
[tex] \boxed{ \bold{ \red{ - 3 {x}^{2} + 2 5\times - 18}}}[/tex]
Explicación paso a paso: