ProPeace
ProPeace ProPeace
  • 20-02-2015
  • Mathematics
contestada

[tex]9X^2-12X+4=0[/tex] X=?

Respuesta :

konrad509
konrad509 konrad509
  • 20-02-2015
[tex]9x^2-12x+4=0\\ (3x-2)^2=0\\ 3x-2=0\\ 3x=2\\ x=\dfrac{2}{3} [/tex]
Answer Link
ValyRemus
ValyRemus ValyRemus
  • 20-02-2015
[tex]9x^2-12x+4=0[/tex] 

[tex](3x)^2-2\cdot 2\cdot3x+2^2=0[/tex]

[tex](3x-2)^2=0, but...(3x-2)^2 \geq 0[/tex] , ∨ x∈R

[tex]So, (3x-2)^2=0[/tex]

[tex]3x-2=0[/tex] ⇒ [tex]3x=2[/tex] ⇒ [tex]\boxed { x= \frac{2}{3} }[/tex]
Answer Link

Otras preguntas

What does atp stand for?
How do our bodies get glucose and other organic molecules fir cellular respiration
Coal is formed when layers of plant matter accumulate at the bottom of a body of water and are protected from biodegradation and oxidization. Over time, the pro
Fran has a plank of wood 4.65 meters long. She wants to cut it into pieces 0.85 meters long. How many pieces of wood that length can she cut from the plank? Can
Which is an example of homeostasis? A. A dog having a litter of puppies B. Eating food C. Sweating on a hot day
Solve st + 3t = 6 for s
consumidores primarios secundarios terciarios productores descomponedores
What are cyberespionage groups stealing from the United States?
6681 divided by 53 equals
Simplify .6(x-3y)+.4x-y