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Question
Submitted by keyera.cohen on Mon, 2012-03-05 14:33
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x squared minus 3x plus 4 equals 0

x squared minus 3x plus 4 equals 0

Answer
Submitted by ujwala on Tue, 2012-03-06 05:10
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(3/2)+(7^1/2)i

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The quadratic xxxxxxx is xxxxxxx from the xxxxxxx quadratic xxxxxxxx xxxxxxx by xxxxxxxxxx xxx xxxxxxx

The xxxxxxx xxxxxxxxx xxxxxxxxxxx

ax² + bx x c x 0

has roots...

continuation is xx the attachment

and xxxx for xxxxxxx xxxxx xxx xxxx

http://www.teacherschoice.com.au/maths_library/algebra/alg_6.htm

xx u have any doubts u can xxxxxxx me

my mail id is ujwalavk@yahoo.co.in

file1.docx preview (43 words)

The xxxxxxxxx xxxxxxx is xxxxxxx xxxx the general quadratic xxxxxxxx xxxxxxx by completing the xxxxxxx

The xxxxxxx quadratic xxxxxxxxxxx

ax² x xx x c = x

xxx xxxxxxxx

            


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Answer
Submitted by dayamath on Mon, 2012-03-05 15:13
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solution:

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xxx x xx + 4 = x

first method:

xxxx 3x + 4 = x² - 2*(3/2)*x + xxxxxxx - xxxxxxx + 4

x xxxxxxxxx x xxx + 16/4 = xxxxxxxxx + 7/4

thus the xxxxxxxx xx xxxxxxxxxx xx xxxxxxxxx x 7/4 x x

but xx remarque that xxxx xx impossible because xxxxxxxxx >= x xxx all x

xxxx (x-3/2)² + 7/4 >x 7/4 xxx xxx x ( xxxx (x-3/2)² x xxx is never null )

then xxxx xxxxxxxx xxx xx solution in R x set of xxxxxx

xxxxxx xxxxxxx

Delat x b² x 4ac x xxxxxx x xxxxx

x 9 x 16 x -7

xxxxx is negative thus the equation xxx no solutions in x


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