Question

Which polynomial is prime? 3x3 + 3x2 – 2x – 2 3x3 – 2x2 + 3x – 4 4x3 + 2x2 + 6x + 3 4x3 + 4x2 – 3x – 3

Answer 1

The correct answer is B. 3x3 – 2x2 + 3x – 4 :D

have a good day!

Answer 2

Answer:
`3x^3-2x^2+3x-4`

Explanation:

We know that a polynomial is said to be prime if it does not factorize into polynomials.

1.
`3x^3+3x^2-2x-2\\=3x^2(x+1)-1(x+1)\\=(x+1)(3x^2-1)`

This is not prime as it can factorize.

2.
`3x^3-2x^2+3x-4\\=x^2(3x-2)+1(3x-4)`

`(3x-2)\ and\ (3x-4)` are not same , thus we cannot factorize the above polynomial.

Therefore this polynomial is prime.

3.
`4x^3+2x^2+6^x+3=2x^2(2x+1)+3(2x+1)\\=(2x+1)(2x^2+3)`

This is not prime as it can factorize.

4.
`4x^3+4x^2-3x-3\\=4x^2(x+1)-3(x+1)\\=(x+1)(4x^2-3)`

This is not prime as it can factorize.