krishnasjohari krishnasjohari
  • 25-07-2019
  • Mathematics
contestada

find the value of k when the value of x is 2/3
kx2 - x - 2 =0

Respuesta :

Gasaqui
Gasaqui Gasaqui
  • 30-07-2019

Answer:

k=6

Step-by-step explanation:

As stated, x=2/3, so you need to eval in the whole expression given

[tex]k*x^{2} -x-2=0[/tex]

which becomes the following>

[tex]k*(\frac{2}{3}) ^{2}-\frac{2}{3} -2=0\\[/tex]

Solving for K gives>

[tex]k=(2+\frac{2}{3})*\frac{9}{4}\\k=(\frac{9}{2} +\frac{3}{2})[/tex]

[tex]k=\frac{12}{2}[/tex]

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