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Chapter 5 review
Contributed by: Spelman
  • 1. Write the function in standard form: y=(x+5)(x-7)
A) Ah, what was the question?
B) x + 2x -35
C) x2-2x -35
D) x2 + 2x + 35
  • 2. Does the parabola point up or down? y = -2x2 -1x - 5
A) down, the 5 is negative
B) down, the 2 is negative
C) down, the 1 is negative
  • 3. Factor: x2 + 2x - 15
A) (x+5)(x-3)
B) (x-3)(x-5)
C) (x+5)(x+3)
  • 4. Find the vertex: y = 3(x-6)2 - 7
A) -7, -6
B) -7, 6
C) -6, - 7
D) 6,-7
  • 5. Solve by factoring: x2 + 5x -14 =0
A) -7, 2
B) 7, 2
C) -7,-2
D) 7, -2
  • 6. Factor: 3x2 - 75
A) 3(x-5)(x-5)
B) 3(x2-25)
C) 3 (x+5)(x-5)
  • 7. Solve by taking the square roots: x2 = -121
A) no solution
B) 11, -11
C) 11i
D) 11i, - 11i
  • 8. 4(x-7)2 = 72, solve by the square root method
A) 8 (+/-) 2 root 2
B) 6 (+/-) 4 root 3
C) 7 (+ or -) 3 root 2
D) no solution
  • 9. Solve by completing the square: x2 + 4x - 7 = 0
A) -2 + root 11, -2-root 11
B) 4 + root 3, 4 - root 3
C) 3 + root 6, 3 - root 6
D) no solution
  • 10. What is the discriminant of x2-12x + 36 = 0
A) 0
B) 4
C) -3
D) 2
  • 11. using the discriminant, what type of solutions will 2x2 + 1x + 17 = 0 have
A) positive
B) real
C) imaginary
D) discriminants scare me
  • 12. Write a quadratic function in vertex form whose graph has the given vertex and passes through the given point. vertex (4,5) point (8, -3)
A) y = 2 (x+4)2 - 5
B) y = - .5 (x+4)2 - 5
C) y = -1/2 (x-4)2 + 5
  • 13. Factor 36x2 - 84x + 49
A) The only thing I am sure about today is that the break is almost here !
B) (6x+7)(6x+7)
C) (6x - 7 )(6x+7)
D) (6x-7)(6x-7)
  • 14. Multiply 2i ( 3-7i)
A) 6i - 14
B) 14 + 6i
C) 6i - 14 i2
  • 15. Write the expression as a complex number in standard form: (5-3i) / (1 + i)
A) 3 - 5i
B) -1 - 2i
C) 6 - 2i
D) 1 - 4i
  • 16. Find the x-intercepts: y = 3 (x+5)(x-9)
A) at -5 and 9
B) at 5 and -9
C) at -4
D) at 3
  • 17. Find the axis of symmetry: y = -2 ( x+4)(x-6)
A) x = -4
B) x = 6
C) x= -2
D) x=1
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