Algebra Answers

13.2x²+ nx + 5 = 0 has imaginary roots. The range of values of n is?

14.The range of values of, (x + 1)/ (x² + 1)  X e R is?

11. The range of values of a for which the equation ax²+2x - 2 = 0 has real roots is:

                 A. a ≤ 1/2            B. a ≥ 1/2            C. a ≤ -1/2        D. a ≥ -1/2

12. if the graph of y =x² - 8x + m cuts the x-axis in two distinct points then

               A. m < !6                      B. m > 16                  C. m ≤ 16                  D. m ≥ 16

9. If 5x²-3x + p =0 has a repeated root, then what is the value of p?

10. Given that the equation x² + x - k = 0, where k is a constant, has exactly one root between

                x = 0 and x = 1, then

                A, k² - 2k > 0               B. k² - 2k < 0          C. k² + 2k < 0                D. 1 + 4k > 0

7. The curve y = (x + 2)² has a minimum point at?

8. The coordinates of the lowest point on the curve: y = x² - 4x + 1 are?

5. The coordinates of the vertex of the curve y = 1 - 2x - 4x² are:

6. If 2x² - 12x + 11 ≡ 2(x + b)² + c, then

                A. b = 6, c = -7               B. b = 3, c = -7          C. b = -3, c = -7               D. b = 3, c = 7

. If 2x² + px + 1 ≥ -17/18 then p = ?

                A. ± 5               B. -5                       C. 5               D.√42

1.      If 3 + 8x -x² = p then

A. p ≤ 13                   B. p>-19                C. p ≤ 19             D. p ≤ 5

1.      The roots of the equation x²  - 6x + I = 0 are?

2.      The equation of the line of symmetry to the curve y =3x²  - 6x + 5 = 0 is?

The number of Facebook friends one makes after arriving on campus is described by the following function.F(d)=2d,where d is days.Which of the following choices finds f(7)

 3x − 2y + c