15. What is the degree of the expression 5x2 + 7x - X"? A. 2
B. 3
0.7
c. a
-n
16. What must be the value of n so that the term xi-n is of degree 2?
A. - 2
B.- 1
D. 1
C. O
17. In the quadratic function of the form y = ax2 + bx + c, which of the following must not be equal to
0?
D. X-term
A. a
B. b
c. c
18. Which of the following is a quadratic function?
A. y = 5x - 4
C. y = 2x2 - 5x2
D. y = 21 - X-8
B. y = x - 3x2
19. Express f(x) = 3(x – 7)2 + 5, in the form f(x) = ax? + bx + c ?
A. f(x) = 3x2 - 21x + 152
C. f(x) = 3x2 – 212 + 54
B. f(x) = 3.x2 - 42x + 152
D. f(x) = 3x2 - 42x + 54
D. XA-1 = 2x
=
-
20. Which of the following is in the second degree equation?
A. 7x3 - 5x = 4
B. 2* - 3 = 16
C. 5x – 2x2 = 0