ZJSG09112007
ZJSG09112007 ZJSG09112007
  • 01-12-2020
  • Mathematics
contestada

I need help with these questions ( see image for question ).
Please show working.
​

I need help with these questions see image for question Please show working class=

Respuesta :

mhanifa
mhanifa mhanifa
  • 02-12-2020

Answer:

  • k = -4 ± 2√5

Step-by-step explanation:

#22

Given

  • Equation x² -4x + 1 = k(x - 4) with equal roots

To find

  • The value of k

Solution

The equation in standard form is:

  • x² -4x + 1 = k(x - 4)
  • x² - 4x - kx + 1 + 4 = 0
  • x² - (k + 4)x + 5 = 0

When the quadratic equation has equal roots its discriminant is zero

  • D = 0
  • b² - 4ac = 0
  • (k + 4)² - 4*5 = 0
  • (k + 4)² = 20
  • k + 4 = ± √20
  • k = - 4 ± √20
  • or
  • k = -4 ± 2√5
Answer Link

Otras preguntas

Which action is part of becoming involved in community health? A) supporting regional health efforts B)selecting reputable health providers C)creating new heal
What is 1/2 X (6 X 4)+3 + 2 Please show your work
A 1,200 kg car is accelerated at 3.7 m/s2. What force was needed to produce this acceleration? A. 4,440 N B. 324.3 N C. 4,388 N D. 304.3 N
Which ordered pair is a solution of the equation? y + 5 = 2(2+1) Choose 1 answer ® Only (5,10 ® Only (-1,-5) © Both (5, 10) and (-1,-5) 0 Neither
given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6
1-describe 2 points of strategy you could use to help you be successful at basketball2- what were some of the challenges you faced in your pursuit of improved f
I need answer please
what is the 77 element on the periodtic table
Secondary succession would most likely be taking place in a(n)
Which of the following represents a negatively charged ion? OF T 7