Given the equation 2x2 - 5x + 7 = 0. What is the discriminant?

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Given the equation 2x² - 5x + 7 = 0. What is the discriminant?

Describe the roots and explain your reasoning.

Guest Feb 4, 2019

edited by Guest Feb 4, 2019

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Best Answer

(b^2-4ac)= (25-4(2)(7) ) = (25-56) = (-31)

There will be two imaginary roots due to the NEGATIVE discriminant

edited by ElectricPavlov Feb 4, 2019

ElectricPavlov · Answer 1 · 2019-02-04T05:17:01

(b^2-4ac)= (25-4(2)(7) ) = (25-56) = (-31)

There will be two imaginary roots due to the NEGATIVE discriminant

CoolStuffYT · Answer 2 · 2019-02-04T07:02:11

The discriminant formula is $b^2-4ac$ . Substituting...

$(-5)^2-4(7)(2)=25-56=-31$ . The discriminant is -31.

Since the discriminant is negative, it has complex roots.

You are very welcome!

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