Rosy176 Rosy176
  • 15-01-2020
  • Mathematics
contestada

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

Respuesta :

GrandNecro
GrandNecro GrandNecro
  • 15-01-2020

Answer:

k = -1

Step-by-step 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

Answer Link

Otras preguntas

President truman decided to use the atomic bomb on japan in 1945 because
plz help mewho can answer in 1 min
Im doing a project for spanish, what is the weather in Colombia Bogota?
The catalogs of many libraries around the world can be accessed from the Internet. True False
If f(x)=x2+10sinx, show that there is a number c such that f(c)=1000.
How to work -1x-2y=-13 x-2y=11 equation by substitution
How important was the village in early african societies?
Three moles of an ideal gas undergo a reversible isothermal compression at temperature 18.0 ?c. during this compression, an amount of work totalling 1700 j is d
Factor 6y2 + 13y + 15. A) (2y + 1)(3y + 5) B) (3y + 1)(2y + 5) C) (2y + 1)(4y + 5) D) (2y + 5)(3y + 5)
It is important to follow lab safety so no one can get injured or death. lab safety can reduce injuries. ?