C.C
1. Which of the following is a quadratic equation?
A. 2x + 5 = 11 B.? + 6 = 3 C. x2 = 1
D. x3 - x = 4
2. Which of the following is written in standard form?
A. x2 - 5 = 6 B. x2 = 9 C. 3x2 + 4x - 5 = 0 D. x2-x=6
3. In the equation ax2 + bx + c = 0, which of the following cannot be equal to O
for the equation to be quadratic?
A. a
B. b
D. a,b and c
4. In the equation 8x + 3x2 = -5, what is the value ofc?
A. -5
B. 3
C. 5
D. 8
5.In the equation x2 = 4, what is the value of b?
A. O
B. 1
C.4
D. undefined
6. If x2 – X – 6= 0, then x is
A. -2 or 3
B. -1 or 6 C.1 or - 6
D. 2 or- 3
7. If 2x2 + 6x = 36, what are the possible values of x?
A. -1
B. O
C. 1
D. 3
8. Which of the following is the factored form of the expression 5x2 – 13x - 6?
A. (x - 3)(5x + 2)
C. (x - 3)(x + 2)
B. (x + 3)(5x + 2)
D. (x+3)(x + 2)
9.Solve for x: (2x - 1)(x - 4) = 0
A. x = -5 or x = 4
C. x = or x = -4
B. x =
or x = -4
D. x = or x = 4
10. Write an equation that has roots -2 and 1.
A. (x + 1)(x - 2) = 0
C. y = x2 + x - 2
B. (x - 1)(x + 2) = 0
D. y = x2 - x - 2
2
1
2
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Answer:
1.C. x2=1
because the exponent of the variable is2