Find the zeros of the quadratic polynomial √3x² − 8x + 4√3.

2019

Find the zeros of the quadratic polynomial √3x² − 8x + 4√3.

  1. A.

    −2√3, 2/√3

  2. B.

    −2√3, −2/√3

  3. C.

    2√3, 2/√3

  4. D.

    2√3, −2/√3

Attempted by 38 students.

Show answer & explanation

Correct answer: C

Solve √3 x² − 8x + 4√3 = 0 using the quadratic formula with a = √3, b = −8, c = 4√3.

  1. Compute the discriminant: Δ = b² − 4ac = (−8)² − 4(√3)(4√3) = 64 − 48 = 16, so √Δ = 4.

  2. Apply the quadratic formula: x = [−b ± √Δ]/(2a) = [8 ± 4]/(2√3).

  3. Calculate the two roots: (8 + 4)/(2√3) = 12/(2√3) = 6/√3 = 2√3, and (8 − 4)/(2√3) = 4/(2√3) = 2/√3.

Zeros: 2√3 and 2/√3

A video solution is available for this question — log in and enroll to watch it.

Explore the full course: Niacl Ao It Specialist