hh9456987 hh9456987
  • 02-06-2021
  • Mathematics
contestada

8.
If one zero of the quadratic polynomial x2 - 7x + 5k is -2, then find the value of k
​

Respuesta :

jimrgrant1 jimrgrant1
  • 02-06-2021

Answer:

k = - 3.6

Step-by-step explanation:

Given x = - 2 is a zero then f(- 2) = 0

Substitute x = - 2 into the polynomial and equate to zero

(- 2)² - 7(- 2) + 5k = 0

4 + 14 + 5k = 0

18 + 5k = 0 ( subtract 18 from both sides )

5k = - 18 ( divide both sides by 5 )

k = - 3.6

Answer Link

Otras preguntas

name the ways to prove two triangles are similar
Find a + b, 2a + 3b, |a|, and |a − b|. a = 4i + j, b = i − 2j
My heart was a heavy rock in my chest is an example of
name the ways to prove two triangles are similar
the area of the above polygon is ?the answer is not 44
Which state had the most influence in the house of representatives? a. georgia b. new york c. new jersey d. virginia?
Describe the characteristics of an endospore-producing bacteria that make it an ideal candidate for bioterrorism but an undesirable intruder in a hospital setti
What happened when Governor Faubus removed his Arkansas National Guard troops and allowed the police to protect the African American students at the high school
Jarod read 36 pages out of his 180 page book.Which fraction represents the ratio of pages that Jared read to the entire book?
Pelvic bones in whales are an example of " blank" structures. Please fill in the blank! Homologous Analogous Vestigial Please help!!!! :( :)