Answer:
18 using x as 3
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.
3x² - 2x - 1
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
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