Hat is the value of the discriminant for the quadratic equation 0 = x + 2 + x2? Discriminant = b2 - 4ac - 9 - 7 7 9

Question

Jonah Williamson

Mathematics

30 January, 18:24

Hat is the value of the discriminant for the quadratic equation 0 = x + 2 + x2? Discriminant = b2 - 4ac - 9 - 7 7 9

+1

Answers (1)

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Leonard Moore · Answer 1

For the general quadratic equation ax^2 + bx + c = 0 the discriminant is b^2 - 4ac.

So, for x^2 + x + 2 = 0, a = 1, b = 1, and c = 2, therefore

b^2 - 4ac = 1^2 - 4 (1) (2) = 1 - 8 = - 7.

Answer: - 7