Algebra 2 Help!? So Confused?

Algebra 2 Help? 7 Questions?

1. Which expression is not a polynomial?

(Points : 3)

Option A: 9/5x+3

Option B: 5

Option C: 3x^3 + 5x - 4

Option D: 2x^-2

2. Use the polynomial to answer the question.

12x^3 + 5 - 5x2 - 6x2 + 3x3 + 2 - x

Which expresses the polynomial in standard form?

(Points : 3)

15x3 + 11x2 - x + 7

15x6 - 11x4 - x + 7

15x3 - 11x2 - x + 7

15x5 - 11x2 - x - 7

3. Use the expression to answer the question.

(5x2 - 4x + 5) - (3x2 - 6x + 2)

Which is equal to this expression?

(Points : 3)

2x2 - 10x + 7

2x2 - 2x + 3

2x2 + 2x + 3

15x2 - 10x + 7

4. Which is equal to (2x - 3)(5x + 4)?

(Points : 3)

10x2 - 12

10x2 + 23x +12

7x2 - 2x + 1

10x2 - 7x - 12

6. Use the polynomial to answer the question.

6a4 + 9a3 - 12a2

Which represents the polynomial in factored form?

(Points : 3)

3a2(2a2 + 3a - 4)

3a2(2a2 + 9a3 - 12a2)

3a2(3a2 + 9a3 - 12a2)

3a4(2a2 + 3a - 4)

7. Use the polynomial to answer the question.

36x2 - 25

Which represents the polynomial in factored form?

(Points : 3)

(18x - 5)(18x - 5)

(18x - 5)(18x + 5)

(6x + 5)(6x - 5)

(6x - 5)(6x - 5)

8. Use the polynomial to answer the question.

x2 - 9x + 20

Which represents the polynomial in factored form?

(Points : 3)

(x + 4)(x - 5)

(x + 4)(x + 5)

(x - 4)(x - 5)

(x - 4)(x + 5)

PLEASE HELP I'm SO CONFUSED :( Thank you so much...