Entry Exam Category: College Admission Exams
Course: Texas Success Initiative Assessment 2.0
Exam: TSIA2 Math Practice Test
Practice Question
Extract
Choose the best answer. If necessary, use the paper you were given.
For what values of x does 5x ^ 2 + 4x - 4 = 0 ?
Answer Choices
- A: x = 1/5 and x = - 1
- B: x = - 4/5 and x = 1
- C: x = (- 2±6 * √(2))/5
- D: x = (- 2±2 * √(6))/5
Correct Answer: D
Rationale: Used the quadratic formula with a = 5, b = 4, c = -4. Discriminant is 96. Simplified square root and reduced the expression to get the solution: x = (-2 ± 2√6)/5