Answer:
[tex]-18x^{4} - 6x^{3} + 9x^{2}[/tex]
Step-by-step explanation:
Multiply each term in the parentheses by [tex]-3x^{2}[/tex]
[tex]-3x^{2}[/tex] × [tex]6x^{2} - 3x^{2}[/tex] × [tex]2x - 3x^{2}[/tex] × [tex](-3)[/tex]
Calculate the products:
[tex]-18x^{4} - 6x^{3} - 9x^{2}[/tex]
