Question

Which expression is equal to (x + 2) (−3x² + 3x + 1)?

-3x³ + 9x² - 5x + 2
-3x² + 5x + 3
-3x²- 3x + 2
-3x^3 - 3x^2 + 7x + 2​

Answer 1

The last one is correct

Explanation:

multiply -3
`x^(2)` + 3x + 1 by x and the by 2 and then add them together.

x(-3
`x^(2)` + 3x + 1)

-3
`x^(3)` + 3
`x^(2)` + x

2(-3
`x^(2)` + 3x + 1)

-6
`x^(2)` +6x +2

Add the two bold expressions above to find the answer.

-3
`x^(3)` + 3
`x^(2)` + x -6
`x^(2)` + 6x + 2

-3
`x^(3)` -3
`x^(2)` +7x +2

Answer 2

The right answer choice is the last one

-3x^3 - 3x^2 + 7x + 2