Multiply. (3x+1) (x-1) Express the answer in standard form. Enter your answer in the box.

3x² - 2x - 1

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor, that is

3x (x - 1) + 1 (x - 1) ← distribute both parenthesis

= 3x² - 3x + x - 1 ← collect like terms

= 3x² - 2x - 1 ← in standard form

18 using x as 3

Step-by-step explanation:

It all depends on what the x is so say I have x=3 so then it would be 18.

The sum of three x plus one times the difference of x-one.