Multiple choice

Which of the following equations has 2 as a root?

  1. x2 - 4x +5 = 0

  2. x2 + 3x-12 = 0

  3. 2x2 - 7x +6 = 0

  4. 3x2- 6x -2 = 0
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Substitute x=2 into each equation. For C: 2(2^2) - 7(2) + 6 = 2(4) - 14 + 6 = 8 - 14 + 6 = 0. This is correct.

AI explanation

To determine which equation has 2 as a root, substitute x = 2 into each option. For the equation 2x2 - 7x + 6 = 0, substituting the value yields 2(2)2 - 7(2) + 6 = 0. Calculating this gives 8 - 14 + 6 = 0, which confirms the equality holds.

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