The roots of a quadratic equation are -4 and -5. Which of the following quadratic equations has these roots?

A. x² + x-20 = 0

B. x²-x+ 20 = 0

C. x² + 9x + 20 = 0

D. x² - 9x + 20 = 0


In a quadratic equation, the value of b² -4ac is called:

A. The demominator

B. The diameter

C. The discriminant

D. The divisor


If the discriminant is less than 0, what is the nature of the roots?

A. The roots are real and equal

B. The roots are rational numbers but are not equal

C. The roots are irrational numbers and are not equal

D. The equation has no reak roots


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