habibahakki887
habibahakki887 habibahakki887
  • 03-12-2020
  • Mathematics
contestada

If the product of the two roots of the equation : (k - 2) x2 - 6 X + 12 = 0 is 3, then k =
(a) zero
(b) 4
(c) 6
(d) 38​

Respuesta :

jimrgrant1 jimrgrant1
  • 03-12-2020

Answer:

(c)

Step-by-step explanation:

Given a quadratic equation in standard form

ax² + bx + c = 0

Then the product of the roots = [tex]\frac{c}{a}[/tex]

(k - 2)x² - 6x + 12 = 0 ← is in standard form

with a = k - 2 and c = 12 , thus

[tex]\frac{12}{k-2}[/tex] = 3 ( multiply both sides by (k - 1) )

12 = 3(k - 2) = 3k - 6 ( add 6 to both sides )

18 = 3k ( divide both sides by 3 )

6 = k → (c)

Answer Link

Otras preguntas

Petra has an interview with an IT company. What technique can help prepare her? Practice answering standard interview questions Read scholarly articles regardin
HELP ASAP IT'S URGENT PLEASEEE!!! A tower is composed of a prism with a square base and a pyramid. The base length is 20 meters, and the height of the prism is
Work out an estimate for 304 × 9.96 ________ 0.51
During reconstruction which political party was supported by the kkk and the white league? a. the troy party b. the democratic partyc. the republican partyd. t
..... need help ......
Your auto insurance policy has a $200 monthly premium and $700 deductible. what is the maximum amount you will have to pay out of pocket for a car accident befo
What function do mirrors serve in reflecting telescopes????
Four times the sum of b and 24 is at most -15
All of the following are equivalent, except _____. 2x + x x(2 + 1) 2x2 3x
characterisyics of the line y=x