kimberly198116 kimberly198116

23-01-2022
Mathematics

contestada

7 and -3 are the roots of the quadratic equation x^2+kx-21=0 what is the value of k

Respuesta :

jen4755 jen4755

23-01-2022

Answer:

-4

Step-by-step explanation:

The roots are 7 and -3, so the factored version is (x - 7) (x + 3)

Foil them and you get x^2 - 4x - 21

Answer Link

Otras preguntas

Which of the following expressions are equivalent to (x + y) - z Choose all answers that apply: A. z + (x + y) B. x + (y − z) C. None of the above

At what point is the function y=(x+3)/(x^(2)-7x+12) continuous

Why do you think it was beneficial for the Chinese people to join their villages into states?

In which set do all of the values make the inequality 2x - 1 < 10 true?

The physical parts of the computer that store and process data are called: A. digital. B. analog. C. hardware. D. software.

The combined area of two squares is 45 square centimeter each side of one square is twice as long as the side of another square what is the length of each side

List the phases of the business cycle and describe how the different phases begin and end.

Why are molecule atoms far away from each other

Choose the multiple choice answer nearest in meaning to the original sentence

Explain why atmospheric pressure changes as depth changes