Friday

July 25, 2014

July 25, 2014

Posted by **jona** on Saturday, February 14, 2009 at 5:24pm.

3x^2-6x+2=0

3(x^2-2x)+2=0

3(x^2-2x+1-1)+2=0

3(x-1)^2 -1 =0

3(x-1)^2=1

now what do i do?... the answer is supposed to be x=3+-(square root)of3-> the whole thing over 3

- math -
**Damon**, Saturday, February 14, 2009 at 5:32pm3x^2-6x+2=0

well, here is what I do:

3 x^2 - 6 x = -2 get the x^2 and x terms alone on left

x^2 - 2 x = -2/3 divide to get 1x^2

x^2 - 2 x + (2/2)^2 = -2/3 + (2/2)^2 add square if half of coefficient of x to both sides

x^2 - 2 x + 1 = -2/3 + 3/3

(x-1)^2 = 1/3

x-1 = +/- sqrt(1/3)

x = 1 +/- (1/3)sqrt 3

x =(1/3)(3+/- sqrt 3)

- math -
**Damon**, Saturday, February 14, 2009 at 5:36pmwhat you missed is maybe

sqrt (1/3) = 1/sqrt 3

multiply top and bottom by sqrt 3 to clear denominator of radical

1/sqrt 3 = (1/3)sqrt 3

- math -
**karly**, Sunday, February 15, 2009 at 11:43pmwhat is the value of 6 in 146027?

**Related Questions**

math,correction - Is this correct now. Problem #1 solve by completing the square...

math,help,algebra I - I need help can someone help me get unstuck and let me ...

Math help NOW!!!!! Plz - Solve by completing the square : 2x^2= 9x+5

Algebra - I am stuck and hope that you can help me... How do I solve 3x^2-x-4=0 ...

Algebra 2 - Solve by completing the square. aČ - 2√(3a) + 2 = 0 Solve for ...

algrebra 2 - it is called completing the square here is the equation 4x^2-4x+1=9...

math - x^2-9x-4=6 solve by completing the square show steps plz :D Add 4 to both...

Maths integration - Please help! These 2 questions are very similar, and i tried...

Math - Solve each of the following quadratic equations by completing the aquare...

maths - Consider the equation x(square) + 4px + 2q = 0 where p and q are real ...