# Exam

Exam

1. If x = -1, the value of -x2 + 1 is:

 a) 0 b) 2 c) 3 d) None of them

2. The expession for the sentence: "Three times a number plus five" is...

 a) (x + 5)3 b) 3·(x + 5) c) 3x + 5 d) x3 + 5

3.    is ...

 a) ...a monomial of degree 5 b) ...not a monomial c) ... a monomial whose coefficient is 3/2 d) ... a monomial of degree 7

4. x + x2 =

 a) x3 b) 2x2 c) x + x2 d) 2x3

5. 7abc - 3a2 + 2b2 - 7cba, is ...

 a) ... a polynomial of degree 2 b) ... a polynomial of degree 3 c) ... a binomial of degree 2 d) None of them

6. If P = x3 - 4x2 + 8x - 2 and Q = -4x2 + 2, then P - Q is:

 a) x3 + 8x - 4 b) x3 - 8x2 + 8x c) x3 - 8x2 + 8x -4 d) x3 + 8x + 4

7. and P·Q is:

 a) -4x5 + 16x4 -30x3 + 16x2 + 18x - 4 b) -4x5 + 16x4 -30x3 + 18x - 4 c) -4x5 + 16x4 -30x3 + 18x + 4 d) -4x5 + 16x4 -30x3 - 16x2 + 18x - 4

8. If we get the common factor in the expression: 3ab - 6a3b + 21a3b3, we obtain...

 a) ab·(3 - 6a2 + 7a2b2) b) 3ab·(-2a2 + 7a2b2) c) 3ab·(1 - 2a2 + 7a2b2) d) None of them

9. x2 + 7 = 0, is ...

 a)  ...an expression b)  ... an identity c)  ... an equation d)  None of them

10. (2x2 - y)2 =

 a) 2x4 + y2 - 4x2y b) 4x4 + y2 - 4x2y c) 4x4 - y2 - 4x2y d) 2x4 - y2 - 4x2y