34.5k views
4 votes
The expressions (x+4) is a factor of x2+kx-20 what is the value of k how do you know

User Anirudh
by
7.9k points

1 Answer

5 votes

Answer:

k = -1

Explanation:

You're given (x+4) as one of the factor for the equation

x² + kx - 20 = 0

what number does 4 multiply with to get -20? It's -5.

So

= (x+4)(x-5)

= x² + -1x - 20

= x² + kx - 20

User Angle
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories