question\nexpress as a trinomial.\n$(x - 1)(3x - 9)$

Explanation:

Step1: Use the distributive property (FOIL method)

$$(x - 1)(3x - 9)=x\times(3x - 9)-1\times(3x - 9)$$

Step2: Distribute (x) and (- 1)

$$=3x^{2}-9x-3x + 9$$

Step3: Combine like terms

$$=3x^{2}+(-9x-3x)+9=3x^{2}-12x + 9$$

Answer:

(3x^{2}-12x + 9)