4x^2 - 6x + 2 = 0
Divide the equation by two:
2x^2 - 3x + 1 = 0
Factor:
(2x - 1)(x - 1) = 0
x = 1/2, x = 1
2007-08-12 08:59:19
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answer #1
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answered by McFate 7
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A quadratic equation with real (or complex) coefficients has two (not necessarily distinct) solutions, called roots, which may be real or complex, given by the quadratic formula:
2ax= - b- ( b^2-4ac)^.5, and 2a x= -b+(b^2-4ac)^.5
____________
There fore x= (6-2) / 8 = 1/2 and x = (6+2)/8 = 1
Checking by substitution in original 4x^2 - 6x + 2 = 0
For x = 1/2, 4/4 - 3 + 2 = 0 OK
For x=1 4(1) - 6 + 2 + 0 OK
2007-08-12 17:26:13
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answer #2
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answered by gugulimpy 1
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4x^2 - 6x + 2 = 0
4x^2 - 4x - 2x + 2 = 0
4x(x - 1) - 2(x - 1) = 0
(4x - 2)(x - 1) = 0
x = 1, x = 1/2
Suppose (ax^2 + bx + c) is a quadratic equation. To factor it, split b in two numbers that when multiplied gives you the product of a and c.
2007-08-12 15:58:41
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answer #3
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answered by Anonymous
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4x^2 - 6x + 2
factor out 2
2 (2x^2 - 3x + 1) = 0
factor. Find two numbers that multiply to 2 and add to -3
the two numbers are -1 and -2. Since the leading coefficent is not 1, replace the middle terms
2 (2x^2 - 2x - 1x + 1) = 0
factor by groups
2 [ (2x^2 - 2x) + (-1x + 1) ] = 0
factor out GCF
2 [ 2x (x - 1) + -1(x - 1) ] = 0
2 [ 2x (x - 1) - 1(x - 1) ] = 0
factor out (x - 1)
2 (x - 1) (2x - 1) = 0
x = 1 or 1/2
2007-08-12 15:59:08
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answer #4
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answered by 7
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4x²- 6x + 2 = 0
4x² - 4x - 2x + 2 = 0
Group factor
(4x² - 4x) - (2x + 2) = 0
4x(x - 1) - 2(x - 1) = 0
(4x - 2)(x - 1) = 0
- - - - - - - - -s-
2007-08-12 16:13:09
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answer #5
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answered by SAMUEL D 7
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I think this is how you do it
first you factor
and then you'll get
(2x-1)(2x+2) = 0
then you find out what numbers subsitiuted for X will give you zero in each parentheses
so
x= -1,1/2
2007-08-12 15:59:55
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answer #6
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answered by the worr e ore 5
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4x^2 - 6x + 2 = 0 // divide by 4
x^2 - 1.5x + 0.5 = 0
Completing the square:
x^2 - 2*0.75x + 0.75^2 - 0.75^2 + 0.5 = 0
(x - 0.75)^2 - 0.5625 + 0.5 = 0
(x - 0.75)^2 - 0.0625 = 0
(x - 0.75)^2 - 0.25^2 = 0
(x - 0.75 - 0.25)(x - 0.75 + 0.25) = 0
(x - 1)(x - 0.5) = 0
x1 = 1
x2 = 0.5
2007-08-12 16:01:05
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answer #7
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answered by Amit Y 5
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